30790057 has 4 divisors (see below), whose sum is σ = 31541076. Its totient is φ = 30039040.

The previous prime is 30790049. The next prime is 30790061. The reversal of 30790057 is 75009703.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4769856 + 26020201 = 2184^2 + 5101^2 .

It is a cyclic number.

It is not a de Polignac number, because 30790057 - 2³ = 30790049 is a prime.

It is a super-2 number, since 2×30790057² = 1896055220126498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30790027) 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, 375448 + ... + 375529.

It is an arithmetic number, because the mean of its divisors is an integer number (7885269).

Almost surely, 2^30790057 is an apocalyptic number.

It is an amenable number.

30790057 is a deficient number, since it is larger than the sum of its proper divisors (751019).

30790057 is an equidigital number, since it uses as much as digits as its factorization.

30790057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751018.

The product of its (nonzero) digits is 6615, while the sum is 31.

The square root of 30790057 is about 5548.8788957771. The cubic root of 30790057 is about 313.4273068314.

The spelling of 30790057 in words is "thirty million, seven hundred ninety thousand, fifty-seven".