28613457 has 12 divisors (see below), whose sum is σ = 41380404. Its totient is φ = 19052640.

The previous prime is 28613441. The next prime is 28613461. The reversal of 28613457 is 75431682.

It can be written as a sum of positive squares in 2 ways, for example, as 11048976 + 17564481 = 3324^2 + 4191^2 .

It is not a de Polignac number, because 28613457 - 2⁴ = 28613441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28613437) 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, 9607 + ... + 12227.

It is an arithmetic number, because the mean of its divisors is an integer number (3448367).

Almost surely, 2^28613457 is an apocalyptic number.

It is an amenable number.

28613457 is a deficient number, since it is larger than the sum of its proper divisors (12766947).

28613457 is a wasteful number, since it uses less digits than its factorization.

28613457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3840 (or 3837 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 28613457 is about 5349.1547930491. The cubic root of 28613457 is about 305.8605349337.

The spelling of 28613457 in words is "twenty-eight million, six hundred thirteen thousand, four hundred fifty-seven".