3999610944 has 672 divisors, whose sum is σ = 15063459840. Its totient is φ = 987807744.

The previous prime is 3999610939. The next prime is 3999610963. The reversal of 3999610944 is 4490169993.

It is a tau number, because it is divible by the number of its divisors (672).

It is a super-2 number, since 2×3999610944² = 31993775406729142272, which 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 95 ways as a sum of consecutive naturals, for example, 67789987 + ... + 67790045.

Almost surely, 2^3999610944 is an apocalyptic number.

3999610944 is a gapful number since it is divisible by the number (34) 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 3999610944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7531729920).

3999610944 is an abundant number, since it is smaller than the sum of its proper divisors (11063848896).

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

3999610944 is a wasteful number, since it uses less digits than its factorization.

3999610944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1889568, while the sum is 54.

The square root of 3999610944 is about 63242.4773708304. The cubic root of 3999610944 is about 1587.3495846409.

The spelling of 3999610944 in words is "three billion, nine hundred ninety-nine million, six hundred ten thousand, nine hundred forty-four".