674654640 has 80 divisors (see below), whose sum is σ = 2281568256. Its totient is φ = 163552000.

The previous prime is 674654609. The next prime is 674654663. The reversal of 674654640 is 46456476.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 674654592 and 674654601.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125136 + ... + 130415.

Almost surely, 2^674654640 is an apocalyptic number.

674654640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

674654640 is an abundant number, since it is smaller than the sum of its proper divisors (1606913616).

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

674654640 is a wasteful number, since it uses less digits than its factorization.

674654640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255578 (or 255572 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 42.

The square root of 674654640 is about 25974.1148068611. The cubic root of 674654640 is about 877.0556901985.

The spelling of 674654640 in words is "six hundred seventy-four million, six hundred fifty-four thousand, six hundred forty".