381641490 has 32 divisors (see below), whose sum is σ = 1017711360. Its totient is φ = 101770992.

The previous prime is 381641453. The next prime is 381641509. The reversal of 381641490 is 94146183.

381641490 is a `hidden beast` number, since 3 + 8 + 1 + 641 + 4 + 9 + 0 = 666.

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, 706474 + ... + 707013.

It is an arithmetic number, because the mean of its divisors is an integer number (31803480).

Almost surely, 2^381641490 is an apocalyptic number.

381641490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381641490 is an abundant number, since it is smaller than the sum of its proper divisors (636069870).

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

381641490 is a wasteful number, since it uses less digits than its factorization.

381641490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413503 (or 1413497 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 381641490 is about 19535.6466491386. The cubic root of 381641490 is about 725.3570908359.

The spelling of 381641490 in words is "three hundred eighty-one million, six hundred forty-one thousand, four hundred ninety".