381919542 has 8 divisors (see below), whose sum is σ = 763839096. Its totient is φ = 127306512.

The previous prime is 381919519. The next prime is 381919553. The reversal of 381919542 is 245919183.

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

381919542 is an admirable number.

It is a super-2 number, since 2×381919542² = 291725073122979528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 381919494 and 381919503.

It is a congruent number.

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, 31826623 + ... + 31826634.

It is an arithmetic number, because the mean of its divisors is an integer number (95479887).

Almost surely, 2^381919542 is an apocalyptic number.

381919542 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.

381919542 is a wasteful number, since it uses less digits than its factorization.

381919542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63653262.

The product of its digits is 77760, while the sum is 42.

The square root of 381919542 is about 19542.7618825999. The cubic root of 381919542 is about 725.5332055351.

The spelling of 381919542 in words is "three hundred eighty-one million, nine hundred nineteen thousand, five hundred forty-two".