381478656 has 144 divisors (see below), whose sum is σ = 1151507840. Its totient is φ = 111144960.

The previous prime is 381478639. The next prime is 381478661. The reversal of 381478656 is 656874183.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 188691 + ... + 190701.

Almost surely, 2^381478656 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 381478656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (575753920).

381478656 is an abundant number, since it is smaller than the sum of its proper divisors (770029184).

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

381478656 is a wasteful number, since it uses less digits than its factorization.

381478656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2062 (or 2048 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 381478656 is about 19531.4785922623. The cubic root of 381478656 is about 725.2539140745.

The spelling of 381478656 in words is "three hundred eighty-one million, four hundred seventy-eight thousand, six hundred fifty-six".