870020790 has 32 divisors (see below), whose sum is σ = 2091799296. Its totient is φ = 231588960.

The previous prime is 870020771. The next prime is 870020791. The reversal of 870020790 is 97020078.

870020790 is a modest number, since divided by 20790 gives 870 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870020791) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8866 + ... + 42645.

It is an arithmetic number, because the mean of its divisors is an integer number (65368728).

Almost surely, 2^870020790 is an apocalyptic number.

870020790 is an abundant number, since it is smaller than the sum of its proper divisors (1221778506).

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

870020790 is a wasteful number, since it uses less digits than its factorization.

870020790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52084.

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 870020790 is about 29496.1148289059. The cubic root of 870020790 is about 954.6478750790.

The spelling of 870020790 in words is "eight hundred seventy million, twenty thousand, seven hundred ninety".