877408720 has 20 divisors (see below), whose sum is σ = 2039975460. Its totient is φ = 350963456.

The previous prime is 877408673. The next prime is 877408759. The reversal of 877408720 is 27804778.

It can be written as a sum of positive squares in 2 ways, for example, as 492307344 + 385101376 = 22188^2 + 19624^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 5483725 + ... + 5483884.

It is an arithmetic number, because the mean of its divisors is an integer number (101998773).

Almost surely, 2^877408720 is an apocalyptic number.

877408720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

877408720 is an abundant number, since it is smaller than the sum of its proper divisors (1162566740).

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

877408720 is a wasteful number, since it uses less digits than its factorization.

877408720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10967622 (or 10967616 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 43.

The square root of 877408720 is about 29621.0857329707. The cubic root of 877408720 is about 957.3424473820.

The spelling of 877408720 in words is "eight hundred seventy-seven million, four hundred eight thousand, seven hundred twenty".