13002999840 has 72 divisors (see below), whose sum is σ = 44372741868. Its totient is φ = 3467466240.

The previous prime is 13002999833. The next prime is 13002999857. The reversal of 13002999840 is 4899920031.

It can be written as a sum of positive squares in 2 ways, for example, as 11098201104 + 1904798736 = 105348^2 + 43644^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4513491 + ... + 4516370.

Almost surely, 2^13002999840 is an apocalyptic number.

13002999840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13002999840 is an abundant number, since it is smaller than the sum of its proper divisors (31369742028).

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

13002999840 is a wasteful number, since it uses less digits than its factorization.

13002999840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9029882 (or 9029871 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 13002999840 in words is "thirteen billion, two million, nine hundred ninety-nine thousand, eight hundred forty".