3999469680 has 120 divisors (see below), whose sum is σ = 13444312128. Its totient is φ = 1065512448.

The previous prime is 3999469613. The next prime is 3999469699. The reversal of 3999469680 is 869649993.

3999469680 is a `hidden beast` number, since 3 + 9 + 99 + 469 + 6 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

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, 1044249 + ... + 1048071.

Almost surely, 2^3999469680 is an apocalyptic number.

3999469680 is a gapful number since it is divisible by the number (30) 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 3999469680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6722156064).

3999469680 is an abundant number, since it is smaller than the sum of its proper divisors (9444842448).

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

3999469680 is a wasteful number, since it uses less digits than its factorization.

3999469680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5295 (or 5286 counting only the distinct ones).

The product of its (nonzero) digits is 22674816, while the sum is 63.

The square root of 3999469680 is about 63241.3605166745. The cubic root of 3999469680 is about 1587.3308963239.

The spelling of 3999469680 in words is "three billion, nine hundred ninety-nine million, four hundred sixty-nine thousand, six hundred eighty".