28623900 has 36 divisors (see below), whose sum is σ = 82819352. Its totient is φ = 7632960.

The previous prime is 28623871. The next prime is 28623901. The reversal of 28623900 is 932682.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28623901) by changing a digit.

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, 47407 + ... + 48006.

Almost surely, 2^28623900 is an apocalyptic number.

28623900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28623900 is an abundant number, since it is smaller than the sum of its proper divisors (54195452).

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

28623900 is a wasteful number, since it uses less digits than its factorization.

28623900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95430 (or 95423 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 28623900 is about 5350.1308395216. The cubic root of 28623900 is about 305.8977401907.

The spelling of 28623900 in words is "twenty-eight million, six hundred twenty-three thousand, nine hundred".