30900156 has 72 divisors (see below), whose sum is σ = 87050880. Its totient is φ = 8355744.

The previous prime is 30900151. The next prime is 30900193. The reversal of 30900156 is 65100903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30900151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29815 + ... + 30833.

It is an arithmetic number, because the mean of its divisors is an integer number (1209040).

Almost surely, 2^30900156 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 30900156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43525440).

30900156 is an abundant number, since it is smaller than the sum of its proper divisors (56150724).

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

30900156 is a wasteful number, since it uses less digits than its factorization.

30900156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1050 counting only the distinct ones).

The product of its (nonzero) digits is 810, while the sum is 24.

The square root of 30900156 is about 5558.7908757211. The cubic root of 30900156 is about 313.8004465902.

The spelling of 30900156 in words is "thirty million, nine hundred thousand, one hundred fifty-six".