672240 has 40 divisors (see below), whose sum is σ = 2084688. Its totient is φ = 179200.

The previous prime is 672229. The next prime is 672251. The reversal of 672240 is 42276.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (672229) and next prime (672251).

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

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

672240 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, 1161 + ... + 1640.

2⁶⁷²²⁴⁰ is an apocalyptic number.

672240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

672240 is an abundant number, since it is smaller than the sum of its proper divisors (1412448).

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

672240 is a wasteful number, since it uses less digits than its factorization.

672240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2817 (or 2811 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 672240 is about 819.9024332200. The cubic root of 672240 is about 87.6008089832.

The spelling of 672240 in words is "six hundred seventy-two thousand, two hundred forty".