30428657 has 12 divisors (see below), whose sum is σ = 37479780. Its totient is φ = 24546816.

The previous prime is 30428621. The next prime is 30428687. The reversal of 30428657 is 75682403.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23464336 + 6964321 = 4844^2 + 2639^2 .

It is not a de Polignac number, because 30428657 - 2¹⁴ = 30412273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30428687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17432 + ... + 19097.

It is an arithmetic number, because the mean of its divisors is an integer number (3123315).

Almost surely, 2^30428657 is an apocalyptic number.

It is an amenable number.

30428657 is a deficient number, since it is larger than the sum of its proper divisors (7051123).

30428657 is a wasteful number, since it uses less digits than its factorization.

30428657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36560 (or 36553 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 30428657 is about 5516.2176353005. The cubic root of 30428657 is about 312.1961872888.

The spelling of 30428657 in words is "thirty million, four hundred twenty-eight thousand, six hundred fifty-seven".