28250136 has 24 divisors (see below), whose sum is σ = 76510980. Its totient is φ = 9416688.

The previous prime is 28250087. The next prime is 28250143. The reversal of 28250136 is 63105282.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 196110 + ... + 196253.

Almost surely, 2^28250136 is an apocalyptic number.

It is an amenable number.

28250136 is an abundant number, since it is smaller than the sum of its proper divisors (48260844).

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

28250136 is a wasteful number, since it uses less digits than its factorization.

28250136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392375 (or 392368 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 28250136 is about 5315.0857001557. The cubic root of 28250136 is about 304.5604561786.

The spelling of 28250136 in words is "twenty-eight million, two hundred fifty thousand, one hundred thirty-six".