674445440 has 32 divisors (see below), whose sum is σ = 1612347660. Its totient is φ = 269777920.

The previous prime is 674445439. The next prime is 674445469. The reversal of 674445440 is 44544476.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 671431744 + 3013696 = 25912^2 + 1736^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 674445394 and 674445403.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 526271 + ... + 527550.

Almost surely, 2^674445440 is an apocalyptic number.

It is an amenable number.

674445440 is an abundant number, since it is smaller than the sum of its proper divisors (937902220).

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

674445440 is a wasteful number, since it uses less digits than its factorization.

674445440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053840 (or 1053828 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 38.

The square root of 674445440 is about 25970.0874084012. The cubic root of 674445440 is about 876.9650270120.

The spelling of 674445440 in words is "six hundred seventy-four million, four hundred forty-five thousand, four hundred forty".