381158840 has 32 divisors (see below), whose sum is σ = 861690960. Its totient is φ = 151737600.

The previous prime is 381158839. The next prime is 381158849. The reversal of 381158840 is 48851183.

It is a super-2 number, since 2×381158840² = 290564122620291200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381158794 and 381158803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381158849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14141 + ... + 31020.

Almost surely, 2^381158840 is an apocalyptic number.

It is an amenable number.

381158840 is an abundant number, since it is smaller than the sum of its proper divisors (480532120).

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

381158840 is a wasteful number, since it uses less digits than its factorization.

381158840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45383 (or 45379 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 381158840 is about 19523.2896818134. The cubic root of 381158840 is about 725.0511830690.

The spelling of 381158840 in words is "three hundred eighty-one million, one hundred fifty-eight thousand, eight hundred forty".