381456138 has 16 divisors (see below), whose sum is σ = 871899840. Its totient is φ = 108987456.

The previous prime is 381456121. The next prime is 381456157. The reversal of 381456138 is 831654183.

It is a junction number, because it is equal to n+sod(n) for n = 381456096 and 381456105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4541103 + ... + 4541186.

It is an arithmetic number, because the mean of its divisors is an integer number (54493740).

Almost surely, 2^381456138 is an apocalyptic number.

381456138 is an abundant number, since it is smaller than the sum of its proper divisors (490443702).

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

381456138 is a wasteful number, since it uses less digits than its factorization.

381456138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9082301.

The product of its digits is 69120, while the sum is 39.

The square root of 381456138 is about 19530.9021297020. The cubic root of 381456138 is about 725.2396436484.

The spelling of 381456138 in words is "three hundred eighty-one million, four hundred fifty-six thousand, one hundred thirty-eight".