83904491004 has 72 divisors (see below), whose sum is σ = 211092416640. Its totient is φ = 25889101920.

The previous prime is 83904490993. The next prime is 83904491023. The reversal of 83904491004 is 40019440938.

It is a super-2 number, since 2×83904491004² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107067 + ... + 423405.

It is an arithmetic number, because the mean of its divisors is an integer number (2931839120).

Almost surely, 2^83904491004 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 83904491004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105546208320).

83904491004 is an abundant number, since it is smaller than the sum of its proper divisors (127187925636).

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

83904491004 is a wasteful number, since it uses less digits than its factorization.

83904491004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316431 (or 316398 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 42.

The spelling of 83904491004 in words is "eighty-three billion, nine hundred four million, four hundred ninety-one thousand, four".