869387904 has 448 divisors, whose sum is σ = 3264310080. Its totient is φ = 225815040.

The previous prime is 869387873. The next prime is 869387917. The reversal of 869387904 is 409783968.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 79035259 + ... + 79035269.

Almost surely, 2^869387904 is an apocalyptic number.

869387904 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869387904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1632155040).

869387904 is an abundant number, since it is smaller than the sum of its proper divisors (2394922176).

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

869387904 is an frugal number, since it uses more digits than its factorization.

869387904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 54.

The square root of 869387904 is about 29485.3845828743. The cubic root of 869387904 is about 954.4163366134.

The spelling of 869387904 in words is "eight hundred sixty-nine million, three hundred eighty-seven thousand, nine hundred four".