381992331390 has 32 divisors (see below), whose sum is σ = 916917044256. Its totient is φ = 101849571840.

The previous prime is 381992331361. The next prime is 381992331403. The reversal of 381992331390 is 93133299183.

It is a congruent number.

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, 733431 + ... + 1141010.

It is an arithmetic number, because the mean of its divisors is an integer number (28653657633).

Almost surely, 2^381992331390 is an apocalyptic number.

381992331390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381992331390 is an abundant number, since it is smaller than the sum of its proper divisors (534924712866).

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

381992331390 is a wasteful number, since it uses less digits than its factorization.

381992331390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1881244.

The product of its (nonzero) digits is 944784, while the sum is 51.

The spelling of 381992331390 in words is "three hundred eighty-one billion, nine hundred ninety-two million, three hundred thirty-one thousand, three hundred ninety".