28077580 has 12 divisors (see below), whose sum is σ = 58962960. Its totient is φ = 11231024.

The previous prime is 28077571. The next prime is 28077593. The reversal of 28077580 is 8577082.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 701920 + ... + 701959.

It is an arithmetic number, because the mean of its divisors is an integer number (4913580).

Almost surely, 2^28077580 is an apocalyptic number.

28077580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28077580 is an abundant number, since it is smaller than the sum of its proper divisors (30885380).

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

28077580 is a wasteful number, since it uses less digits than its factorization.

28077580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403888 (or 1403886 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 28077580 is about 5298.8281723415. The cubic root of 28077580 is about 303.9390892508.

The spelling of 28077580 in words is "twenty-eight million, seventy-seven thousand, five hundred eighty".