672899220 has 72 divisors (see below), whose sum is σ = 2332721664. Its totient is φ = 153805248.

The previous prime is 672899207. The next prime is 672899251. The reversal of 672899220 is 22998276.

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

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265764 + ... + 268283.

It is an arithmetic number, because the mean of its divisors is an integer number (32398912).

Almost surely, 2^672899220 is an apocalyptic number.

672899220 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

672899220 is an abundant number, since it is smaller than the sum of its proper divisors (1659822444).

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

672899220 is a wasteful number, since it uses less digits than its factorization.

672899220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534069 (or 534064 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 672899220 is about 25940.3010776668. The cubic root of 672899220 is about 876.2943434464.

The spelling of 672899220 in words is "six hundred seventy-two million, eight hundred ninety-nine thousand, two hundred twenty".