672761844 has 36 divisors (see below), whose sum is σ = 1704420900. Its totient is φ = 223749120.

The previous prime is 672761821. The next prime is 672761857. The reversal of 672761844 is 448167276.

672761844 is a `hidden beast` number, since 6 + 7 + 27 + 618 + 4 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 345513744 + 327248100 = 18588^2 + 18090^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 672761844.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4647 + ... + 36974.

It is an arithmetic number, because the mean of its divisors is an integer number (47345025).

Almost surely, 2^672761844 is an apocalyptic number.

It is an amenable number.

672761844 is an abundant number, since it is smaller than the sum of its proper divisors (1031659056).

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

672761844 is a wasteful number, since it uses less digits than its factorization.

672761844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42080 (or 42075 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 672761844 is about 25937.6530164161. The cubic root of 672761844 is about 876.2347059845.

The spelling of 672761844 in words is "six hundred seventy-two million, seven hundred sixty-one thousand, eight hundred forty-four".