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31440102 = 235240017
BaseRepresentation
bin111011111101…
…1110011100110
32012011022201020
41313323303212
531022040402
63041512010
7531144051
oct167736346
965138636
1031440102
1116824461
12a642606
13668a615
144265a98
152b608bc
hex1dfbce6

31440102 has 8 divisors (see below), whose sum is σ = 62880216. Its totient is φ = 10480032.

The previous prime is 31440083. The next prime is 31440109. The reversal of 31440102 is 20104413.

It is a sphenic number, since it is the product of 3 distinct primes.

31440102 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31440109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2620003 + ... + 2620014.

It is an arithmetic number, because the mean of its divisors is an integer number (7860027).

Almost surely, 231440102 is an apocalyptic number.

31440102 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31440102 is a wasteful number, since it uses less digits than its factorization.

31440102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5240022.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 31440102 is about 5607.1474030919. The cubic root of 31440102 is about 315.6176743978.

Adding to 31440102 its reverse (20104413), we get a palindrome (51544515).

The spelling of 31440102 in words is "thirty-one million, four hundred forty thousand, one hundred two".

Divisors: 1 2 3 6 5240017 10480034 15720051 31440102