28077320 has 32 divisors (see below), whose sum is σ = 65214720. Its totient is φ = 10868160.

The previous prime is 28077277. The next prime is 28077331. The reversal of 28077320 is 2377082.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10082 + ... + 12561.

It is an arithmetic number, because the mean of its divisors is an integer number (2037960).

Almost surely, 2^28077320 is an apocalyptic number.

28077320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28077320 is an abundant number, since it is smaller than the sum of its proper divisors (37137400).

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

28077320 is a wasteful number, since it uses less digits than its factorization.

28077320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22685 (or 22681 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 29.

The square root of 28077320 is about 5298.8036385584. The cubic root of 28077320 is about 303.9381510834.

The spelling of 28077320 in words is "twenty-eight million, seventy-seven thousand, three hundred twenty".