30788372 has 12 divisors (see below), whose sum is σ = 55737780. Its totient is φ = 14863296.

The previous prime is 30788371. The next prime is 30788399. The reversal of 30788372 is 27388703.

It can be written as a sum of positive squares in 2 ways, for example, as 18369796 + 12418576 = 4286^2 + 3524^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30788371) 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 3 ways as a sum of consecutive naturals, for example, 132593 + ... + 132824.

It is an arithmetic number, because the mean of its divisors is an integer number (4644815).

Almost surely, 2^30788372 is an apocalyptic number.

It is an amenable number.

30788372 is a deficient number, since it is larger than the sum of its proper divisors (24949408).

30788372 is a wasteful number, since it uses less digits than its factorization.

30788372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265450 (or 265448 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 30788372 is about 5548.7270612276. The cubic root of 30788372 is about 313.4215892427.

The spelling of 30788372 in words is "thirty million, seven hundred eighty-eight thousand, three hundred seventy-two".