30742857 has 12 divisors (see below), whose sum is σ = 44501184. Its totient is φ = 20451480.

The previous prime is 30742853. The next prime is 30742861. The reversal of 30742857 is 75824703.

It is an interprime number because it is at equal distance from previous prime (30742853) and next prime (30742861).

It is not a de Polignac number, because 30742857 - 2² = 30742853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30742853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1132 + ... + 7922.

It is an arithmetic number, because the mean of its divisors is an integer number (3708432).

Almost surely, 2^30742857 is an apocalyptic number.

It is an amenable number.

30742857 is a deficient number, since it is larger than the sum of its proper divisors (13758327).

30742857 is a wasteful number, since it uses less digits than its factorization.

30742857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7300 (or 7297 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 30742857 is about 5544.6241531776. The cubic root of 30742857 is about 313.2670674966.

The spelling of 30742857 in words is "thirty million, seven hundred forty-two thousand, eight hundred fifty-seven".