28632556 has 24 divisors (see below), whose sum is σ = 53555040. Its totient is φ = 13347072.

The previous prime is 28632533. The next prime is 28632559. The reversal of 28632556 is 65523682.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28632559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5481 + ... + 9343.

It is an arithmetic number, because the mean of its divisors is an integer number (2231460).

Almost surely, 2^28632556 is an apocalyptic number.

It is an amenable number.

28632556 is a deficient number, since it is larger than the sum of its proper divisors (24922484).

28632556 is a wasteful number, since it uses less digits than its factorization.

28632556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3993 (or 3991 counting only the distinct ones).

The product of its digits is 86400, while the sum is 37.

The square root of 28632556 is about 5350.9397305520. The cubic root of 28632556 is about 305.9285720477.

The spelling of 28632556 in words is "twenty-eight million, six hundred thirty-two thousand, five hundred fifty-six".