30697272 has 128 divisors (see below), whose sum is σ = 91929600. Its totient is φ = 9465984.

The previous prime is 30697253. The next prime is 30697273. The reversal of 30697272 is 27279603.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30697273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 183733 + ... + 183899.

It is an arithmetic number, because the mean of its divisors is an integer number (718200).

Almost surely, 2^30697272 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 30697272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45964800).

30697272 is an abundant number, since it is smaller than the sum of its proper divisors (61232328).

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

30697272 is a wasteful number, since it uses less digits than its factorization.

30697272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 36.

The square root of 30697272 is about 5540.5118897084. The cubic root of 30697272 is about 313.1121551617.

The spelling of 30697272 in words is "thirty million, six hundred ninety-seven thousand, two hundred seventy-two".