28502236 has 24 divisors (see below), whose sum is σ = 57117536. Its totient is φ = 12191040.

The previous prime is 28502231. The next prime is 28502239. The reversal of 28502236 is 63220582.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28502231) 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, 27406 + ... + 28426.

Almost surely, 2^28502236 is an apocalyptic number.

It is an amenable number.

28502236 is an abundant number, since it is smaller than the sum of its proper divisors (28615300).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28502236 is a wasteful number, since it uses less digits than its factorization.

28502236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029 (or 2027 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28502236 is about 5338.7485424957. The cubic root of 28502236 is about 305.4637252983.

The spelling of 28502236 in words is "twenty-eight million, five hundred two thousand, two hundred thirty-six".