30787412 has 12 divisors (see below), whose sum is σ = 54434100. Its totient is φ = 15234816.

The previous prime is 30787411. The next prime is 30787417. The reversal of 30787412 is 21478703.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 5827396 + 24960016 = 2414^2 + 4996^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30787411) 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, 39287 + ... + 40062.

It is an arithmetic number, because the mean of its divisors is an integer number (4536175).

Almost surely, 2^30787412 is an apocalyptic number.

It is an amenable number.

30787412 is a deficient number, since it is larger than the sum of its proper divisors (23646688).

30787412 is a wasteful number, since it uses less digits than its factorization.

30787412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79450 (or 79448 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 30787412 is about 5548.6405542259. The cubic root of 30787412 is about 313.4183316508.

The spelling of 30787412 in words is "thirty million, seven hundred eighty-seven thousand, four hundred twelve".