870261620 has 24 divisors (see below), whose sum is σ = 1935053064. Its totient is φ = 327627776.

The previous prime is 870261599. The next prime is 870261629. The reversal of 870261620 is 26162078.

It can be written as a sum of positive squares in 4 ways, for example, as 342916324 + 527345296 = 18518^2 + 22964^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870261629) 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, 1279457 + ... + 1280136.

It is an arithmetic number, because the mean of its divisors is an integer number (80627211).

Almost surely, 2^870261620 is an apocalyptic number.

It is an amenable number.

870261620 is an abundant number, since it is smaller than the sum of its proper divisors (1064791444).

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

870261620 is a wasteful number, since it uses less digits than its factorization.

870261620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2559619 (or 2559617 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 870261620 is about 29500.1969484951. The cubic root of 870261620 is about 954.7359521457.

The spelling of 870261620 in words is "eight hundred seventy million, two hundred sixty-one thousand, six hundred twenty".