30628657 has 2 divisors, whose sum is σ = 30628658. Its totient is φ = 30628656.

The previous prime is 30628607. The next prime is 30628723. The reversal of 30628657 is 75682603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26790976 + 3837681 = 5176^2 + 1959^2 .

It is a cyclic number.

It is not a de Polignac number, because 30628657 - 2⁷ = 30628529 is a prime.

It is a super-2 number, since 2×30628657² = 1876229259247298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30628607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15314328 + 15314329.

It is an arithmetic number, because the mean of its divisors is an integer number (15314329).

Almost surely, 2^30628657 is an apocalyptic number.

It is an amenable number.

30628657 is a deficient number, since it is larger than the sum of its proper divisors (1).

30628657 is an equidigital number, since it uses as much as digits as its factorization.

30628657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 30628657 is about 5534.3163082715. The cubic root of 30628657 is about 312.8786901414.

The spelling of 30628657 in words is "thirty million, six hundred twenty-eight thousand, six hundred fifty-seven".