381391508442 has 32 divisors (see below), whose sum is σ = 871785638784. Its totient is φ = 108964800000.

The previous prime is 381391508413. The next prime is 381391508461. The reversal of 381391508442 is 244805193183.

381391508442 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×381391508442⁴ (a number of 47 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381391508391 and 381391508400.

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, 1023442 + ... + 1345442.

It is an arithmetic number, because the mean of its divisors is an integer number (27243301212).

Almost surely, 2^381391508442 is an apocalyptic number.

381391508442 is an abundant number, since it is smaller than the sum of its proper divisors (490394130342).

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

381391508442 is a wasteful number, since it uses less digits than its factorization.

381391508442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350214.

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 381391508442 in words is "three hundred eighty-one billion, three hundred ninety-one million, five hundred eight thousand, four hundred forty-two".