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30328188 = 22311229759
BaseRepresentation
bin111001110110…
…0010101111100
32010001211110020
41303230111330
530231000223
63002012140
7515533242
oct163542574
963054406
1030328188
1116135020
12a1a7050
13638b497
144056792
1529e11e3
hex1cec57c

30328188 has 24 divisors (see below), whose sum is σ = 77199360. Its totient is φ = 9190320.

The previous prime is 30328159. The next prime is 30328189. The reversal of 30328188 is 88182303.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30328189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114748 + ... + 115011.

It is an arithmetic number, because the mean of its divisors is an integer number (3216640).

Almost surely, 230328188 is an apocalyptic number.

It is an amenable number.

30328188 is an abundant number, since it is smaller than the sum of its proper divisors (46871172).

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

30328188 is a wasteful number, since it uses less digits than its factorization.

30328188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229777 (or 229775 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 30328188 is about 5507.1034128660. The cubic root of 30328188 is about 311.8522064645.

The spelling of 30328188 in words is "thirty million, three hundred twenty-eight thousand, one hundred eighty-eight".

Divisors: 1 2 3 4 6 11 12 22 33 44 66 132 229759 459518 689277 919036 1378554 2527349 2757108 5054698 7582047 10109396 15164094 30328188