30703057 has 12 divisors (see below), whose sum is σ = 38963376. Its totient is φ = 23924040.

The previous prime is 30703033. The next prime is 30703067. The reversal of 30703057 is 75030703.

It is not a de Polignac number, because 30703057 - 2⁷ = 30702929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30703067) 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, 27943 + ... + 29020.

It is an arithmetic number, because the mean of its divisors is an integer number (3246948).

Almost surely, 2^30703057 is an apocalyptic number.

It is an amenable number.

30703057 is a deficient number, since it is larger than the sum of its proper divisors (8260319).

30703057 is a wasteful number, since it uses less digits than its factorization.

30703057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56988 (or 56981 counting only the distinct ones).

The product of its (nonzero) digits is 2205, while the sum is 25.

The square root of 30703057 is about 5541.0339287898. The cubic root of 30703057 is about 313.1318229251.

The spelling of 30703057 in words is "thirty million, seven hundred three thousand, fifty-seven".