28621136 has 20 divisors (see below), whose sum is σ = 56395200. Its totient is φ = 14067552.

The previous prime is 28621121. The next prime is 28621169. The reversal of 28621136 is 63112682.

It is a junction number, because it is equal to n+sod(n) for n = 28621099 and 28621108.

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, 14216 + ... + 16103.

It is an arithmetic number, because the mean of its divisors is an integer number (2819760).

Almost surely, 2^28621136 is an apocalyptic number.

It is an amenable number.

28621136 is a deficient number, since it is larger than the sum of its proper divisors (27774064).

28621136 is a wasteful number, since it uses less digits than its factorization.

28621136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30386 (or 30380 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 28621136 is about 5349.8725218457. The cubic root of 28621136 is about 305.8878937736.

The spelling of 28621136 in words is "twenty-eight million, six hundred twenty-one thousand, one hundred thirty-six".