720840032990 has 64 divisors (see below), whose sum is σ = 1669860569088. Its totient is φ = 217429747200.

The previous prime is 720840032987. The next prime is 720840033031. The reversal of 720840032990 is 99230048027.

It is a super-2 number, since 2×720840032990² (a number of 25 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 31 ways as a sum of consecutive naturals, for example, 15075419 + ... + 15123158.

It is an arithmetic number, because the mean of its divisors is an integer number (26091571392).

Almost surely, 2^720840032990 is an apocalyptic number.

720840032990 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

720840032990 is an abundant number, since it is smaller than the sum of its proper divisors (949020536098).

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

720840032990 is a wasteful number, since it uses less digits than its factorization.

720840032990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30198633.

The product of its (nonzero) digits is 217728, while the sum is 44.

The spelling of 720840032990 in words is "seven hundred twenty billion, eight hundred forty million, thirty-two thousand, nine hundred ninety".