381157056 has 112 divisors (see below), whose sum is σ = 1280647680. Its totient is φ = 108898560.

The previous prime is 381157027. The next prime is 381157061. The reversal of 381157056 is 650751183.

381157056 is a `hidden beast` number, since 3 + 81 + 1 + 570 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (112).

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

It is a self number, because there is not a number n which added to its sum of digits gives 381157056.

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, 3660 + ... + 27851.

Almost surely, 2^381157056 is an apocalyptic number.

381157056 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 381157056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640323840).

381157056 is an abundant number, since it is smaller than the sum of its proper divisors (899490624).

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

381157056 is a wasteful number, since it uses less digits than its factorization.

381157056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31539 (or 31523 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 381157056 is about 19523.2439927385. The cubic root of 381157056 is about 725.0500518754.

The spelling of 381157056 in words is "three hundred eighty-one million, one hundred fifty-seven thousand, fifty-six".