28732180 has 24 divisors (see below), whose sum is σ = 63514080. Its totient is φ = 10887840.

The previous prime is 28732169. The next prime is 28732189. The reversal of 28732180 is 8123782.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28732189) 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, 37426 + ... + 38185.

It is an arithmetic number, because the mean of its divisors is an integer number (2646420).

Almost surely, 2^28732180 is an apocalyptic number.

28732180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28732180 is an abundant number, since it is smaller than the sum of its proper divisors (34781900).

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

28732180 is a wasteful number, since it uses less digits than its factorization.

28732180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75639 (or 75637 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28732180 is about 5360.2406662388. The cubic root of 28732180 is about 306.2829768738.

The spelling of 28732180 in words is "twenty-eight million, seven hundred thirty-two thousand, one hundred eighty".