381148390 has 32 divisors (see below), whose sum is σ = 787475520. Its totient is φ = 130113024.

The previous prime is 381148351. The next prime is 381148393. The reversal of 381148390 is 93841183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381148393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4626 + ... + 27994.

It is an arithmetic number, because the mean of its divisors is an integer number (24608610).

Almost surely, 2^381148390 is an apocalyptic number.

381148390 is an abundant number, since it is smaller than the sum of its proper divisors (406327130).

381148390 is a wasteful number, since it uses less digits than its factorization.

381148390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23616.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 381148390 is about 19523.0220509019. The cubic root of 381148390 is about 725.0445569128.

The spelling of 381148390 in words is "three hundred eighty-one million, one hundred forty-eight thousand, three hundred ninety".