381290722 has 8 divisors (see below), whose sum is σ = 605579436. Its totient is φ = 179430912.

The previous prime is 381290719. The next prime is 381290737. The reversal of 381290722 is 227092183.

It can be written as a sum of positive squares in 2 ways, for example, as 287607681 + 93683041 = 16959^2 + 9679^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×381290722² = 290765229366562568, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (34), and also a Moran number because the ratio is a prime number: 11214433 = 381290722 / (3 + 8 + 1 + 2 + 9 + 0 + 7 + 2 + 2).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 5607183 + ... + 5607250.

Almost surely, 2^381290722 is an apocalyptic number.

381290722 is a deficient number, since it is larger than the sum of its proper divisors (224288714).

381290722 is a wasteful number, since it uses less digits than its factorization.

381290722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11214452.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 381290722 is about 19526.6669454877. Note that the first 3 decimals coincide. The cubic root of 381290722 is about 725.1347966564.

It can be divided in two parts, 381290 and 722, that multiplied together give a triangular number (275291380 = T₂₃₄₆₄).

The spelling of 381290722 in words is "three hundred eighty-one million, two hundred ninety thousand, seven hundred twenty-two".