672720 has 40 divisors (see below), whose sum is σ = 2086176. Its totient is φ = 179328.

The previous prime is 672703. The next prime is 672743. The reversal of 672720 is 27276.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

672720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1162 + ... + 1641.

2⁶⁷²⁷²⁰ is an apocalyptic number.

672720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

672720 is an abundant number, since it is smaller than the sum of its proper divisors (1413456).

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

672720 is a wasteful number, since it uses less digits than its factorization.

672720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2819 (or 2813 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 672720 is about 820.1950987418. The cubic root of 672720 is about 87.6216539117.

Adding to 672720 its reverse (27276), we get a palindrome (699996).

The spelling of 672720 in words is "six hundred seventy-two thousand, seven hundred twenty".