672558840 has 96 divisors (see below), whose sum is σ = 2189257200. Its totient is φ = 179066880.

The previous prime is 672558833. The next prime is 672558869. The reversal of 672558840 is 48855276.

672558840 is a `hidden beast` number, since 6 + 7 + 25 + 588 + 40 = 666.

672558840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 333435 + ... + 335445.

Almost surely, 2^672558840 is an apocalyptic number.

672558840 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 672558840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1094628600).

672558840 is an abundant number, since it is smaller than the sum of its proper divisors (1516698360).

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

672558840 is a wasteful number, since it uses less digits than its factorization.

672558840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2957 (or 2950 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 672558840 is about 25933.7394141300. The cubic root of 672558840 is about 876.1465633298.

The spelling of 672558840 in words is "six hundred seventy-two million, five hundred fifty-eight thousand, eight hundred forty".