672170040 has 96 divisors (see below), whose sum is σ = 2195154000. Its totient is φ = 178375680.

The previous prime is 672170027. The next prime is 672170047. The reversal of 672170040 is 40071276.

It is a junction number, because it is equal to n+sod(n) for n = 672169986 and 672170013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672170047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71536 + ... + 80384.

Almost surely, 2^672170040 is an apocalyptic number.

672170040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 672170040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1097577000).

672170040 is an abundant number, since it is smaller than the sum of its proper divisors (1522983960).

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

672170040 is a wasteful number, since it uses less digits than its factorization.

672170040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9077 (or 9070 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 672170040 is about 25926.2423038897. The cubic root of 672170040 is about 875.9777000641.

The spelling of 672170040 in words is "six hundred seventy-two million, one hundred seventy thousand, forty".