28650057 has 16 divisors (see below), whose sum is σ = 39843840. Its totient is φ = 18289152.

The previous prime is 28650047. The next prime is 28650067. The reversal of 28650057 is 75005682.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28650047) and next prime (28650067).

It is not a de Polignac number, because 28650057 - 2²⁴ = 11872841 is a prime.

It is a super-2 number, since 2×28650057² = 1641651532206498, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28650007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9753 + ... + 12345.

It is an arithmetic number, because the mean of its divisors is an integer number (2490240).

Almost surely, 2^28650057 is an apocalyptic number.

It is an amenable number.

28650057 is a deficient number, since it is larger than the sum of its proper divisors (11193783).

28650057 is a wasteful number, since it uses less digits than its factorization.

28650057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 28650057 is about 5352.5748009720. The cubic root of 28650057 is about 305.9908899847.

The spelling of 28650057 in words is "twenty-eight million, six hundred fifty thousand, fifty-seven".