870020040 has 64 divisors (see below), whose sum is σ = 2623248000. Its totient is φ = 230833152.

The previous prime is 870020017. The next prime is 870020071. The reversal of 870020040 is 40020078.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 870019989 and 870020016.

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, 5664 + ... + 42096.

It is an arithmetic number, because the mean of its divisors is an integer number (40988250).

Almost surely, 2^870020040 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 870020040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1311624000).

870020040 is an abundant number, since it is smaller than the sum of its proper divisors (1753227960).

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

870020040 is a wasteful number, since it uses less digits than its factorization.

870020040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36646 (or 36642 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 870020040 is about 29496.1021153643. The cubic root of 870020040 is about 954.6476007613.

The spelling of 870020040 in words is "eight hundred seventy million, twenty thousand, forty".