672121044 has 288 divisors, whose sum is σ = 2224696320. Its totient is φ = 174182400.

The previous prime is 672121039. The next prime is 672121063. The reversal of 672121044 is 440121276.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 672120999 and 672121017.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2788764 + ... + 2789004.

It is an arithmetic number, because the mean of its divisors is an integer number (7724640).

Almost surely, 2^672121044 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 672121044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1112348160).

672121044 is an abundant number, since it is smaller than the sum of its proper divisors (1552575276).

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

672121044 is a wasteful number, since it uses less digits than its factorization.

672121044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 672121044 is about 25925.2973753436. The cubic root of 672121044 is about 875.9564155459.

The spelling of 672121044 in words is "six hundred seventy-two million, one hundred twenty-one thousand, forty-four".