28632520 has 32 divisors (see below), whose sum is σ = 73627200. Its totient is φ = 9816768.

The previous prime is 28632509. The next prime is 28632521. The reversal of 28632520 is 2523682.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28632521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50850 + ... + 51409.

It is an arithmetic number, because the mean of its divisors is an integer number (2300850).

Almost surely, 2^28632520 is an apocalyptic number.

28632520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28632520 is an abundant number, since it is smaller than the sum of its proper divisors (44994680).

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

28632520 is a wasteful number, since it uses less digits than its factorization.

28632520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102277 (or 102273 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 28632520 is about 5350.9363666558. The cubic root of 28632520 is about 305.9284438319.

The spelling of 28632520 in words is "twenty-eight million, six hundred thirty-two thousand, five hundred twenty".