28359980 has 36 divisors (see below), whose sum is σ = 65467920. Its totient is φ = 10311840.

The previous prime is 28359977. The next prime is 28360039. The reversal of 28359980 is 8995382.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 3440 + ... + 8279.

Almost surely, 2^28359980 is an apocalyptic number.

28359980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28359980 is an abundant number, since it is smaller than the sum of its proper divisors (37107940).

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

28359980 is a wasteful number, since it uses less digits than its factorization.

28359980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11750 (or 11737 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 28359980 is about 5325.4089044880. The cubic root of 28359980 is about 304.9546828666.

The spelling of 28359980 in words is "twenty-eight million, three hundred fifty-nine thousand, nine hundred eighty".