381752290 has 16 divisors (see below), whose sum is σ = 709320960. Its totient is φ = 147774960.

The previous prime is 381752279. The next prime is 381752291. The reversal of 381752290 is 92257183.

It is not an unprimeable number, because it can be changed into a prime (381752291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 615420 + ... + 616039.

It is an arithmetic number, because the mean of its divisors is an integer number (44332560).

Almost surely, 2^381752290 is an apocalyptic number.

381752290 is a deficient number, since it is larger than the sum of its proper divisors (327568670).

381752290 is a wasteful number, since it uses less digits than its factorization.

381752290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1231497.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 381752290 is about 19538.4822849678. The cubic root of 381752290 is about 725.4272804346.

The spelling of 381752290 in words is "three hundred eighty-one million, seven hundred fifty-two thousand, two hundred ninety".