870521740 has 24 divisors (see below), whose sum is σ = 1994286672. Its totient is φ = 316553280.

The previous prime is 870521731. The next prime is 870521741. The reversal of 870521740 is 47125078.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 870521696 and 870521705.

It is not an unprimeable number, because it can be changed into a prime (870521741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1978239 + ... + 1978678.

It is an arithmetic number, because the mean of its divisors is an integer number (83095278).

Almost surely, 2^870521740 is an apocalyptic number.

It is an amenable number.

870521740 is an abundant number, since it is smaller than the sum of its proper divisors (1123764932).

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

870521740 is a wasteful number, since it uses less digits than its factorization.

870521740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956937 (or 3956935 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 870521740 is about 29504.6054032248. The cubic root of 870521740 is about 954.8310657571.

The spelling of 870521740 in words is "eight hundred seventy million, five hundred twenty-one thousand, seven hundred forty".