28685492 has 12 divisors (see below), whose sum is σ = 54763296. Its totient is φ = 13038840.

The previous prime is 28685479. The next prime is 28685521. The reversal of 28685492 is 29458682.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 651943 = 28685492 / (2 + 8 + 6 + 8 + 5 + 4 + 9 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 325928 + ... + 326015.

It is an arithmetic number, because the mean of its divisors is an integer number (4563608).

Almost surely, 2^28685492 is an apocalyptic number.

28685492 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28685492 is a deficient number, since it is larger than the sum of its proper divisors (26077804).

28685492 is a wasteful number, since it uses less digits than its factorization.

28685492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651958 (or 651956 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 28685492 is about 5355.8838672996. The cubic root of 28685492 is about 306.1169900253.

The spelling of 28685492 in words is "twenty-eight million, six hundred eighty-five thousand, four hundred ninety-two".