3397478256 has 160 divisors (see below), whose sum is σ = 9953251840. Its totient is φ = 1123243200.

The previous prime is 3397478251. The next prime is 3397478291. The reversal of 3397478256 is 6528747933.

3397478256 is a `hidden beast` number, since 33 + 97 + 478 + 2 + 56 = 666.

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 (3397478251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5283471 + ... + 5284113.

It is an arithmetic number, because the mean of its divisors is an integer number (62207824).

Almost surely, 2^3397478256 is an apocalyptic number.

3397478256 is a gapful number since it is divisible by the number (36) 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 3397478256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4976625920).

3397478256 is an abundant number, since it is smaller than the sum of its proper divisors (6555773584).

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

3397478256 is an equidigital number, since it uses as much as digits as its factorization.

3397478256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 799 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 54.

The square root of 3397478256 is about 58287.8911610293. The cubic root of 3397478256 is about 1503.3227461372.

The spelling of 3397478256 in words is "three billion, three hundred ninety-seven million, four hundred seventy-eight thousand, two hundred fifty-six".