672440 has 16 divisors (see below), whose sum is σ = 1513080. Its totient is φ = 268960.

The previous prime is 672439. The next prime is 672443. The reversal of 672440 is 44276.

672440 = T₁₆₃ + T₁₆₄ + ... + T₂₀₂.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672443) 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, 8366 + ... + 8445.

2⁶⁷²⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

672440 is an abundant number, since it is smaller than the sum of its proper divisors (840640).

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

672440 is a wasteful number, since it uses less digits than its factorization.

672440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16822 (or 16818 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 672440 is about 820.0243898812. The cubic root of 672440 is about 87.6094955756.

The spelling of 672440 in words is "six hundred seventy-two thousand, four hundred forty".