381641390 has 16 divisors (see below), whose sum is σ = 739797408. Its totient is φ = 140913696.

The previous prime is 381641389. The next prime is 381641411. The reversal of 381641390 is 93146183.

It is a super-2 number, since 2×381641390² = 291300301122264200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 381641390.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1467722 + ... + 1467981.

It is an arithmetic number, because the mean of its divisors is an integer number (46237338).

Almost surely, 2^381641390 is an apocalyptic number.

381641390 is a deficient number, since it is larger than the sum of its proper divisors (358156018).

381641390 is a wasteful number, since it uses less digits than its factorization.

381641390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2935723.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 381641390 is about 19535.6440897146. The cubic root of 381641390 is about 725.3570274817.

The spelling of 381641390 in words is "three hundred eighty-one million, six hundred forty-one thousand, three hundred ninety".