875491864 has 64 divisors (see below), whose sum is σ = 1796256000. Its totient is φ = 397637760.

The previous prime is 875491853. The next prime is 875491871. The reversal of 875491864 is 468194578.

It is a Harshad number since it is a multiple of its sum of digits (52).

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, 2438517 + ... + 2438875.

It is an arithmetic number, because the mean of its divisors is an integer number (28066500).

Almost surely, 2^875491864 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 875491864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (898128000).

875491864 is an abundant number, since it is smaller than the sum of its proper divisors (920764136).

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

875491864 is a wasteful number, since it uses less digits than its factorization.

875491864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 684 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 52.

The square root of 875491864 is about 29588.7117664828. The cubic root of 875491864 is about 956.6447772405.

The spelling of 875491864 in words is "eight hundred seventy-five million, four hundred ninety-one thousand, eight hundred sixty-four".