28375020 has 36 divisors (see below), whose sum is σ = 86071440. Its totient is φ = 7566624.

The previous prime is 28375019. The next prime is 28375051. The reversal of 28375020 is 2057382.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78640 + ... + 78999.

Almost surely, 2^28375020 is an apocalyptic number.

28375020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28375020 is an abundant number, since it is smaller than the sum of its proper divisors (57696420).

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

28375020 is a wasteful number, since it uses less digits than its factorization.

28375020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157654 (or 157649 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 28375020 is about 5326.8208154583. The cubic root of 28375020 is about 305.0085816810.

The spelling of 28375020 in words is "twenty-eight million, three hundred seventy-five thousand, twenty".