672662172 has 96 divisors (see below), whose sum is σ = 1938625024. Its totient is φ = 176774400.

The previous prime is 672662147. The next prime is 672662173. The reversal of 672662172 is 271266276.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 672662172.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672662173) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 360522 + ... + 362382.

Almost surely, 2^672662172 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 672662172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (969312512).

672662172 is an abundant number, since it is smaller than the sum of its proper divisors (1265962852).

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

672662172 is a wasteful number, since it uses less digits than its factorization.

672662172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219 (or 2217 counting only the distinct ones).

The product of its digits is 84672, while the sum is 39.

The square root of 672662172 is about 25935.7315686294. The cubic root of 672662172 is about 876.1914314440.

The spelling of 672662172 in words is "six hundred seventy-two million, six hundred sixty-two thousand, one hundred seventy-two".