672040 has 32 divisors (see below), whose sum is σ = 1545480. Its totient is φ = 262912.

The previous prime is 672029. The next prime is 672041. The reversal of 672040 is 40276.

It can be written as a sum of positive squares in 4 ways, for example, as 443556 + 228484 = 666^2 + 478^2 .

It is a junction number, because it is equal to n+sod(n) for n = 671999 and 672017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1962 + ... + 2278.

2⁶⁷²⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (772740).

672040 is an abundant number, since it is smaller than the sum of its proper divisors (873440).

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

672040 is a wasteful number, since it uses less digits than its factorization.

672040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 377 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 672040 is about 819.7804584155. The cubic root of 672040 is about 87.5921206677.

The spelling of 672040 in words is "six hundred seventy-two thousand, forty".