381287742 has 32 divisors (see below), whose sum is σ = 832619520. Its totient is φ = 115441920.

The previous prime is 381287723. The next prime is 381287749. The reversal of 381287742 is 247782183.

381287742 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 381287694 and 381287703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381287749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118734 + ... + 121902.

It is an arithmetic number, because the mean of its divisors is an integer number (26019360).

Almost surely, 2^381287742 is an apocalyptic number.

381287742 is an abundant number, since it is smaller than the sum of its proper divisors (451331778).

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

381287742 is a wasteful number, since it uses less digits than its factorization.

381287742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5008.

The product of its digits is 150528, while the sum is 42.

The square root of 381287742 is about 19526.5906394332. The cubic root of 381287742 is about 725.1329075403.

The spelling of 381287742 in words is "three hundred eighty-one million, two hundred eighty-seven thousand, seven hundred forty-two".