672988443840 has 896 divisors, whose sum is σ = 2638528266240. Its totient is φ = 160712294400.

The previous prime is 672988443811. The next prime is 672988443893. The reversal of 672988443840 is 48344889276.

672988443840 is a `hidden beast` number, since 6 + 72 + 9 + 88 + 443 + 8 + 40 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 277748869 + ... + 277751291.

Almost surely, 2^672988443840 is an apocalyptic number.

672988443840 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 672988443840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1319264133120).

672988443840 is an abundant number, since it is smaller than the sum of its proper divisors (1965539822400).

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

672988443840 is a wasteful number, since it uses less digits than its factorization.

672988443840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558 (or 2542 counting only the distinct ones).

The product of its (nonzero) digits is 74317824, while the sum is 63.

The spelling of 672988443840 in words is "six hundred seventy-two billion, nine hundred eighty-eight million, four hundred forty-three thousand, eight hundred forty".