30750057 has 48 divisors (see below), whose sum is σ = 51649920. Its totient is φ = 18038592.

The previous prime is 30750053. The next prime is 30750073. The reversal of 30750057 is 75005703.

It is not a de Polignac number, because 30750057 - 2² = 30750053 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 30750057.

It is not an unprimeable number, because it can be changed into a prime (30750053) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 104803 + ... + 105095.

It is an arithmetic number, because the mean of its divisors is an integer number (1076040).

Almost surely, 2^30750057 is an apocalyptic number.

It is an amenable number.

30750057 is a deficient number, since it is larger than the sum of its proper divisors (20899863).

30750057 is a wasteful number, since it uses less digits than its factorization.

30750057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 3675, while the sum is 27.

The square root of 30750057 is about 5545.2733927192. The cubic root of 30750057 is about 313.2915213812.

The spelling of 30750057 in words is "thirty million, seven hundred fifty thousand, fifty-seven".