381556842 has 8 divisors (see below), whose sum is σ = 763113696. Its totient is φ = 127185612.

The previous prime is 381556811. The next prime is 381556859. The reversal of 381556842 is 248655183.

It is a sphenic number, since it is the product of 3 distinct primes.

381556842 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 381556794 and 381556803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31796398 + ... + 31796409.

It is an arithmetic number, because the mean of its divisors is an integer number (95389212).

Almost surely, 2^381556842 is an apocalyptic number.

381556842 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

381556842 is a wasteful number, since it uses less digits than its factorization.

381556842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63592812.

The product of its digits is 230400, while the sum is 42.

The square root of 381556842 is about 19533.4800278906. The cubic root of 381556842 is about 725.3034588552.

The spelling of 381556842 in words is "three hundred eighty-one million, five hundred fifty-six thousand, eight hundred forty-two".