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30679012 = 2271389947
BaseRepresentation
bin111010100000…
…1111111100100
32010201122200201
41311001333210
530323212022
63013320244
7521524120
oct165017744
963648621
1030679012
1116354661
12a336084
136482080
144108580
152a60127
hex1d41fe4

30679012 has 48 divisors (see below), whose sum is σ = 66890880. Its totient is φ = 11987712.

The previous prime is 30679001. The next prime is 30679027. The reversal of 30679012 is 21097603.

It is a super-2 number, since 2×306790122 = 1882403554592288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31923 + ... + 32869.

It is an arithmetic number, because the mean of its divisors is an integer number (1393560).

Almost surely, 230679012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30679012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33445440).

30679012 is an abundant number, since it is smaller than the sum of its proper divisors (36211868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30679012 is a wasteful number, since it uses less digits than its factorization.

30679012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060 (or 1058 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 30679012 is about 5538.8637824016. The cubic root of 30679012 is about 313.0500588514.

The spelling of 30679012 in words is "thirty million, six hundred seventy-nine thousand, twelve".

Divisors: 1 2 4 7 13 14 26 28 52 89 91 178 182 356 364 623 947 1157 1246 1894 2314 2492 3788 4628 6629 8099 12311 13258 16198 24622 26516 32396 49244 84283 86177 168566 172354 337132 344708 589981 1095679 1179962 2191358 2359924 4382716 7669753 15339506 30679012