674521344 has 216 divisors, whose sum is σ = 2306449600. Its totient is φ = 192595968.

The previous prime is 674521327. The next prime is 674521373. The reversal of 674521344 is 443125476.

It is a tau number, because it is divible by the number of its divisors (216).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 674521299 and 674521308.

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, 434682 + ... + 436230.

Almost surely, 2^674521344 is an apocalyptic number.

674521344 is a gapful number since it is divisible by the number (64) 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 674521344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1153224800).

674521344 is an abundant number, since it is smaller than the sum of its proper divisors (1631928256).

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

674521344 is an equidigital number, since it uses as much as digits as its factorization.

674521344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1561 counting only the distinct ones).

The product of its digits is 80640, while the sum is 36.

The square root of 674521344 is about 25971.5487408818. The cubic root of 674521344 is about 876.9979244872.

The spelling of 674521344 in words is "six hundred seventy-four million, five hundred twenty-one thousand, three hundred forty-four".