381811242 has 16 divisors (see below), whose sum is σ = 766959840. Its totient is φ = 126714192.

The previous prime is 381811223. The next prime is 381811249. The reversal of 381811242 is 242118183.

It is not an unprimeable number, because it can be changed into a prime (381811249) 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, 137568 + ... + 140315.

It is an arithmetic number, because the mean of its divisors is an integer number (47934990).

Almost surely, 2^381811242 is an apocalyptic number.

381811242 is an abundant number, since it is smaller than the sum of its proper divisors (385148598).

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

381811242 is a wasteful number, since it uses less digits than its factorization.

381811242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278117.

The product of its digits is 3072, while the sum is 30.

The square root of 381811242 is about 19539.9908393018. The cubic root of 381811242 is about 725.4646198202.

The spelling of 381811242 in words is "three hundred eighty-one million, eight hundred eleven thousand, two hundred forty-two".