674864838 has 128 divisors (see below), whose sum is σ = 1649894400. Its totient is φ = 203731200.

The previous prime is 674864831. The next prime is 674864851. The reversal of 674864838 is 838468476.

674864838 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (674864831) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2565895 + ... + 2566157.

It is an arithmetic number, because the mean of its divisors is an integer number (12889800).

Almost surely, 2^674864838 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 674864838, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (824947200).

674864838 is an abundant number, since it is smaller than the sum of its proper divisors (975029562).

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

674864838 is a wasteful number, since it uses less digits than its factorization.

674864838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 389 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 54.

The square root of 674864838 is about 25978.1607894015. The cubic root of 674864838 is about 877.1467670242.

The spelling of 674864838 in words is "six hundred seventy-four million, eight hundred sixty-four thousand, eight hundred thirty-eight".