672394720 has 24 divisors (see below), whose sum is σ = 1588532904. Its totient is φ = 268957824.

The previous prime is 672394717. The next prime is 672394721. The reversal of 672394720 is 27493276.

It is a super-2 number, since 2×672394720² = 904229318967756800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) 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 (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672394721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101074 + ... + 2101393.

It is an arithmetic number, because the mean of its divisors is an integer number (66188871).

Almost surely, 2^672394720 is an apocalyptic number.

It is an amenable number.

672394720 is an abundant number, since it is smaller than the sum of its proper divisors (916138184).

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

672394720 is a wasteful number, since it uses less digits than its factorization.

672394720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202482 (or 4202474 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 672394720 is about 25930.5750032659. The cubic root of 672394720 is about 876.0752908188.

The spelling of 672394720 in words is "six hundred seventy-two million, three hundred ninety-four thousand, seven hundred twenty".