28737020 has 24 divisors (see below), whose sum is σ = 64990464. Its totient is φ = 10610496.

The previous prime is 28736989. The next prime is 28737061. The reversal of 28737020 is 2073782.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55004 + ... + 55523.

It is an arithmetic number, because the mean of its divisors is an integer number (2707936).

Almost surely, 2^28737020 is an apocalyptic number.

28737020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28737020 is an abundant number, since it is smaller than the sum of its proper divisors (36253444).

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

28737020 is a wasteful number, since it uses less digits than its factorization.

28737020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110549 (or 110547 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 28737020 is about 5360.6921194935. The cubic root of 28737020 is about 306.3001739257.

The spelling of 28737020 in words is "twenty-eight million, seven hundred thirty-seven thousand, twenty".