870309020 has 48 divisors (see below), whose sum is σ = 2095520448. Its totient is φ = 297423360.

The previous prime is 870309019. The next prime is 870309043. The reversal of 870309020 is 20903078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33890 + ... + 53750.

It is an arithmetic number, because the mean of its divisors is an integer number (43656676).

Almost surely, 2^870309020 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 870309020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1047760224).

870309020 is an abundant number, since it is smaller than the sum of its proper divisors (1225211428).

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

870309020 is a wasteful number, since it uses less digits than its factorization.

870309020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20190 (or 20188 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 870309020 is about 29501.0003220230. Note that the first 3 decimals coincide. The cubic root of 870309020 is about 954.7532855013.

The spelling of 870309020 in words is "eight hundred seventy million, three hundred nine thousand, twenty".