381062556 has 240 divisors, whose sum is σ = 1235942400. Its totient is φ = 99937152.

The previous prime is 381062501. The next prime is 381062573. The reversal of 381062556 is 655260183.

381062556 is a `hidden beast` number, since 38 + 10 + 62 + 556 = 666.

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 381062556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1594285 + ... + 1594523.

It is an arithmetic number, because the mean of its divisors is an integer number (5149760).

Almost surely, 2^381062556 is an apocalyptic number.

381062556 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 381062556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (617971200).

381062556 is an abundant number, since it is smaller than the sum of its proper divisors (854879844).

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

381062556 is a wasteful number, since it uses less digits than its factorization.

381062556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 381062556 is about 19520.8236506557. The cubic root of 381062556 is about 724.9901265401.

It can be divided in two parts, 3810 and 62556, that added together give a palindrome (66366).

The spelling of 381062556 in words is "three hundred eighty-one million, sixty-two thousand, five hundred fifty-six".