380804781 has 16 divisors (see below), whose sum is σ = 581095424. Its totient is φ = 217294704.

The previous prime is 380804759. The next prime is 380804803. The reversal of 380804781 is 187408083.

It is an interprime number because it is at equal distance from previous prime (380804759) and next prime (380804803).

It is not a de Polignac number, because 380804781 - 2⁷ = 380804653 is a prime.

It is a super-2 number, since 2×380804781² = 290024562464915922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380804731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2796 + ... + 27738.

It is an arithmetic number, because the mean of its divisors is an integer number (36318464).

Almost surely, 2^380804781 is an apocalyptic number.

It is an amenable number.

380804781 is a deficient number, since it is larger than the sum of its proper divisors (200290643).

380804781 is a wasteful number, since it uses less digits than its factorization.

380804781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25680.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 380804781 is about 19514.2199690380. The cubic root of 380804781 is about 724.8266131546.

The spelling of 380804781 in words is "three hundred eighty million, eight hundred four thousand, seven hundred eighty-one".