28075100 has 18 divisors (see below), whose sum is σ = 60923184. Its totient is φ = 11230000.

The previous prime is 28075097. The next prime is 28075129. The reversal of 28075100 is 157082.

It is a super-2 number, since 2×28075100² = 1576422480020000, which contains 22 as substring.

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, 140276 + ... + 140475.

Almost surely, 2^28075100 is an apocalyptic number.

28075100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28075100 is an abundant number, since it is smaller than the sum of its proper divisors (32848084).

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

28075100 is a wasteful number, since it uses less digits than its factorization.

28075100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280765 (or 280758 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 28075100 is about 5298.5941531693. The cubic root of 28075100 is about 303.9301403417.

The spelling of 28075100 in words is "twenty-eight million, seventy-five thousand, one hundred".