870682640 has 20 divisors (see below), whose sum is σ = 2024337324. Its totient is φ = 348273024.

The previous prime is 870682633. The next prime is 870682667. The reversal of 870682640 is 46286078.

It can be written as a sum of positive squares in 2 ways, for example, as 413064976 + 457617664 = 20324^2 + 21392^2 .

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

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, 5441687 + ... + 5441846.

Almost surely, 2^870682640 is an apocalyptic number.

870682640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

870682640 is an abundant number, since it is smaller than the sum of its proper divisors (1153654684).

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

870682640 is a wasteful number, since it uses less digits than its factorization.

870682640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10883546 (or 10883540 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 870682640 is about 29507.3319702070. The cubic root of 870682640 is about 954.8898898113.

The spelling of 870682640 in words is "eight hundred seventy million, six hundred eighty-two thousand, six hundred forty".