28512600 has 48 divisors (see below), whose sum is σ = 88390920. Its totient is φ = 7603200.

The previous prime is 28512599. The next prime is 28512623. The reversal of 28512600 is 621582.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23161 + ... + 24360.

Almost surely, 2^28512600 is an apocalyptic number.

28512600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28512600 is an abundant number, since it is smaller than the sum of its proper divisors (59878320).

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

28512600 is a wasteful number, since it uses less digits than its factorization.

28512600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47540 (or 47531 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 28512600 is about 5339.7190937352. The cubic root of 28512600 is about 305.5007451121.

Subtracting from 28512600 its sum of digits (24), we obtain a triangular number (28512576 = T₇₅₅₁).

The spelling of 28512600 in words is "twenty-eight million, five hundred twelve thousand, six hundred".