677691840 has 112 divisors (see below), whose sum is σ = 2459077632. Its totient is φ = 154899456.

The previous prime is 677691811. The next prime is 677691841. The reversal of 677691840 is 48196776.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 677691840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (677691841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43704 + ... + 57143.

Almost surely, 2^677691840 is an apocalyptic number.

677691840 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

677691840 is an abundant number, since it is smaller than the sum of its proper divisors (1781385792).

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

677691840 is a wasteful number, since it uses less digits than its factorization.

677691840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100874 (or 100864 counting only the distinct ones).

The product of its (nonzero) digits is 508032, while the sum is 48.

The square root of 677691840 is about 26032.5150532944. The cubic root of 677691840 is about 878.3698471075.

The spelling of 677691840 in words is "six hundred seventy-seven million, six hundred ninety-one thousand, eight hundred forty".