381982390 has 16 divisors (see below), whose sum is σ = 717463008. Its totient is φ = 146149696.

The previous prime is 381982379. The next prime is 381982399. The reversal of 381982390 is 93289183.

It is a happy number.

It is a super-2 number, since 2×381982390² = 291821092540224200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381982399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 830167 + ... + 830626.

It is an arithmetic number, because the mean of its divisors is an integer number (44841438).

Almost surely, 2^381982390 is an apocalyptic number.

381982390 is a deficient number, since it is larger than the sum of its proper divisors (335480618).

381982390 is a wasteful number, since it uses less digits than its factorization.

381982390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1660823.

The product of its (nonzero) digits is 93312, while the sum is 43.

The square root of 381982390 is about 19544.3697775088. The cubic root of 381982390 is about 725.5730008366.

The spelling of 381982390 in words is "three hundred eighty-one million, nine hundred eighty-two thousand, three hundred ninety".