381731442 has 32 divisors (see below), whose sum is σ = 793582272. Its totient is φ = 122307264.

The previous prime is 381731423. The next prime is 381731459. The reversal of 381731442 is 244137183.

It is a super-2 number, since 2×381731442² = 291437787622798728, which contains 22 as substring.

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, 8068 + ... + 28784.

It is an arithmetic number, because the mean of its divisors is an integer number (24799446).

Almost surely, 2^381731442 is an apocalyptic number.

381731442 is an abundant number, since it is smaller than the sum of its proper divisors (411850830).

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

381731442 is a wasteful number, since it uses less digits than its factorization.

381731442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20842.

The product of its digits is 16128, while the sum is 33.

The square root of 381731442 is about 19537.9487664391. The cubic root of 381731442 is about 725.4140746782.

The spelling of 381731442 in words is "three hundred eighty-one million, seven hundred thirty-one thousand, four hundred forty-two".