381139040 has 24 divisors (see below), whose sum is σ = 900441360. Its totient is φ = 152455552.

The previous prime is 381139039. The next prime is 381139043. The reversal of 381139040 is 40931183.

It is a junction number, because it is equal to n+sod(n) for n = 381138994 and 381139012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381139043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190900 + ... + 1191219.

It is an arithmetic number, because the mean of its divisors is an integer number (37518390).

Almost surely, 2^381139040 is an apocalyptic number.

It is an amenable number.

381139040 is an abundant number, since it is smaller than the sum of its proper divisors (519302320).

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

381139040 is a wasteful number, since it uses less digits than its factorization.

381139040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2382134 (or 2382126 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 381139040 is about 19522.7825885554. The cubic root of 381139040 is about 725.0386281440.

The spelling of 381139040 in words is "three hundred eighty-one million, one hundred thirty-nine thousand, forty".