674388 has 72 divisors (see below), whose sum is σ = 2018016. Its totient is φ = 187200.

The previous prime is 674371. The next prime is 674393. The reversal of 674388 is 883476.

It is a super-3 number, since 3×674388³ = 920133317167137216, which contains 333 as substring.

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 674388.

It is an unprimeable number.

674388 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5083 + ... + 5213.

It is an arithmetic number, because the mean of its divisors is an integer number (28028).

2⁶⁷⁴³⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 674388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009008).

674388 is an abundant number, since it is smaller than the sum of its proper divisors (1343628).

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

674388 is a wasteful number, since it uses less digits than its factorization.

674388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 160 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 674388 is about 821.2113004580. The cubic root of 674388 is about 87.6940130359.

The spelling of 674388 in words is "six hundred seventy-four thousand, three hundred eighty-eight".