672139340 has 12 divisors (see below), whose sum is σ = 1411492656. Its totient is φ = 268855728.

The previous prime is 672139333. The next prime is 672139343. The reversal of 672139340 is 43931276.

It is a self number, because there is not a number n which added to its sum of digits gives 672139340.

It is not an unprimeable number, because it can be changed into a prime (672139343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16803464 + ... + 16803503.

It is an arithmetic number, because the mean of its divisors is an integer number (117624388).

Almost surely, 2^672139340 is an apocalyptic number.

It is an amenable number.

672139340 is an abundant number, since it is smaller than the sum of its proper divisors (739353316).

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

672139340 is a wasteful number, since it uses less digits than its factorization.

672139340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33606976 (or 33606974 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 35.

The square root of 672139340 is about 25925.6502329257. The cubic root of 672139340 is about 875.9643636942.

The spelling of 672139340 in words is "six hundred seventy-two million, one hundred thirty-nine thousand, three hundred forty".