30942788 has 24 divisors (see below), whose sum is σ = 57802752. Its totient is φ = 14442624.

The previous prime is 30942787. The next prime is 30942803. The reversal of 30942788 is 88724903.

It is a super-2 number, since 2×30942788² = 1914912258425888, which contains 22 as substring.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (30942787) 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, 6845 + ... + 10427.

It is an arithmetic number, because the mean of its divisors is an integer number (2408448).

Almost surely, 2^30942788 is an apocalyptic number.

It is an amenable number.

30942788 is a deficient number, since it is larger than the sum of its proper divisors (26859964).

30942788 is a wasteful number, since it uses less digits than its factorization.

30942788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3731 (or 3729 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 30942788 is about 5562.6242008606. The cubic root of 30942788 is about 313.9446938984.

The spelling of 30942788 in words is "thirty million, nine hundred forty-two thousand, seven hundred eighty-eight".