870465640 has 128 divisors (see below), whose sum is σ = 2199830400. Its totient is φ = 307307520.

The previous prime is 870465593. The next prime is 870465691. The reversal of 870465640 is 46564078.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 870465593 and 870465602.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3801046 + ... + 3801274.

It is an arithmetic number, because the mean of its divisors is an integer number (17186175).

Almost surely, 2^870465640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 870465640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1099915200).

870465640 is an abundant number, since it is smaller than the sum of its proper divisors (1329364760).

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

870465640 is a wasteful number, since it uses less digits than its factorization.

870465640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 463 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 40.

The square root of 870465640 is about 29503.6546888686. The cubic root of 870465640 is about 954.8105542366.

The spelling of 870465640 in words is "eight hundred seventy million, four hundred sixty-five thousand, six hundred forty".