381755490 has 16 divisors (see below), whose sum is σ = 916213248. Its totient is φ = 101801456.

The previous prime is 381755489. The next prime is 381755497. The reversal of 381755490 is 94557183.

It is not an unprimeable number, because it can be changed into a prime (381755497) 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, 6362562 + ... + 6362621.

It is an arithmetic number, because the mean of its divisors is an integer number (57263328).

Almost surely, 2^381755490 is an apocalyptic number.

381755490 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

381755490 is an abundant number, since it is smaller than the sum of its proper divisors (534457758).

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

381755490 is a wasteful number, since it uses less digits than its factorization.

381755490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12725193.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 381755490 is about 19538.5641744730. The cubic root of 381755490 is about 725.4293073693.

The spelling of 381755490 in words is "three hundred eighty-one million, seven hundred fifty-five thousand, four hundred ninety".