28486557 has 24 divisors (see below), whose sum is σ = 45658080. Its totient is φ = 16968480.

The previous prime is 28486541. The next prime is 28486561. The reversal of 28486557 is 75568482.

It is not a de Polignac number, because 28486557 - 2⁴ = 28486541 is a prime.

It is a super-2 number, since 2×28486557² = 1622967859428498, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28486517) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3403 + ... + 8279.

It is an arithmetic number, because the mean of its divisors is an integer number (1902420).

Almost surely, 2^28486557 is an apocalyptic number.

It is an amenable number.

28486557 is a deficient number, since it is larger than the sum of its proper divisors (17171523).

28486557 is a wasteful number, since it uses less digits than its factorization.

28486557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953 (or 4950 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 28486557 is about 5337.2799252053. The cubic root of 28486557 is about 305.4077034453.

The spelling of 28486557 in words is "twenty-eight million, four hundred eighty-six thousand, five hundred fifty-seven".