877991040 has 96 divisors (see below), whose sum is σ = 3031832700. Its totient is φ = 234129408.

The previous prime is 877991017. The next prime is 877991063. The reversal of 877991040 is 40199778.

It is an interprime number because it is at equal distance from previous prime (877991017) and next prime (877991063).

It can be written as a sum of positive squares in 2 ways, for example, as 861539904 + 16451136 = 29352^2 + 4056^2 .

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70455 + ... + 81974.

Almost surely, 2^877991040 is an apocalyptic number.

877991040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

877991040 is an abundant number, since it is smaller than the sum of its proper divisors (2153841660).

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

877991040 is a wasteful number, since it uses less digits than its factorization.

877991040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152454 (or 152439 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 877991040 is about 29630.9135869956. The cubic root of 877991040 is about 957.5541907262.

The spelling of 877991040 in words is "eight hundred seventy-seven million, nine hundred ninety-one thousand, forty".