870403872 has 96 divisors (see below), whose sum is σ = 2502480960. Its totient is φ = 263255040.

The previous prime is 870403871. The next prime is 870403967. The reversal of 870403872 is 278304078.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 870403872.

It is not an unprimeable number, because it can be changed into a prime (870403871) 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, 67722 + ... + 79542.

It is an arithmetic number, because the mean of its divisors is an integer number (26067510).

Almost surely, 2^870403872 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 870403872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1251240480).

870403872 is an abundant number, since it is smaller than the sum of its proper divisors (1632077088).

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

870403872 is a wasteful number, since it uses less digits than its factorization.

870403872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11906 (or 11898 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 870403872 is about 29502.6078847277. The cubic root of 870403872 is about 954.7879693385.

The spelling of 870403872 in words is "eight hundred seventy million, four hundred three thousand, eight hundred seventy-two".