380756656 has 60 divisors (see below), whose sum is σ = 903361080. Its totient is φ = 154586880.

The previous prime is 380756653. The next prime is 380756669. The reversal of 380756656 is 656657083.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380756653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2116 + ... + 27676.

It is an arithmetic number, because the mean of its divisors is an integer number (15056018).

Almost surely, 2^380756656 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 380756656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451680540).

380756656 is an abundant number, since it is smaller than the sum of its proper divisors (522604424).

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

380756656 is a wasteful number, since it uses less digits than its factorization.

380756656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25602 (or 25589 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 46.

The square root of 380756656 is about 19512.9868549128. The cubic root of 380756656 is about 724.7960780423.

The spelling of 380756656 in words is "three hundred eighty million, seven hundred fifty-six thousand, six hundred fifty-six".