3999498720 has 384 divisors, whose sum is σ = 15091163136. Its totient is φ = 871243776.

The previous prime is 3999498707. The next prime is 3999498749. The reversal of 3999498720 is 278949993.

It is a super-2 number, since 2×3999498720² = 31991980022563276800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6588657 + ... + 6589263.

It is an arithmetic number, because the mean of its divisors is an integer number (39299904).

Almost surely, 2^3999498720 is an apocalyptic number.

3999498720 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 3999498720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7545581568).

3999498720 is an abundant number, since it is smaller than the sum of its proper divisors (11091664416).

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

3999498720 is a wasteful number, since it uses less digits than its factorization.

3999498720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 714 counting only the distinct ones).

The product of its (nonzero) digits is 8817984, while the sum is 60.

The square root of 3999498720 is about 63241.5901128363. The cubic root of 3999498720 is about 1587.3347381647.

The spelling of 3999498720 in words is "three billion, nine hundred ninety-nine million, four hundred ninety-eight thousand, seven hundred twenty".