28455980 has 48 divisors (see below), whose sum is σ = 68597760. Its totient is φ = 9713088.

The previous prime is 28455979. The next prime is 28455983. The reversal of 28455980 is 8955482.

It is not an unprimeable number, because it can be changed into a prime (28455983) 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 15 ways as a sum of consecutive naturals, for example, 61229 + ... + 61691.

It is an arithmetic number, because the mean of its divisors is an integer number (1429120).

Almost surely, 2^28455980 is an apocalyptic number.

28455980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28455980 is an abundant number, since it is smaller than the sum of its proper divisors (40141780).

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

28455980 is a wasteful number, since it uses less digits than its factorization.

28455980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918 (or 916 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 28455980 is about 5334.4146820434. The cubic root of 28455980 is about 305.2983911290.

The spelling of 28455980 in words is "twenty-eight million, four hundred fifty-five thousand, nine hundred eighty".