380420820781 has 8 divisors (see below), whose sum is σ = 384202719680. Its totient is φ = 376640623872.

The previous prime is 380420820727. The next prime is 380420820803. The reversal of 380420820781 is 187028024083.

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

It is a cyclic number.

It is not a de Polignac number, because 380420820781 - 2⁷ = 380420820653 is a prime.

It is a super-2 number, since 2×380420820781² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380420820281) 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 7 ways as a sum of consecutive naturals, for example, 26125 + ... + 872653.

It is an arithmetic number, because the mean of its divisors is an integer number (48025339960).

Almost surely, 2^380420820781 is an apocalyptic number.

It is an amenable number.

380420820781 is a deficient number, since it is larger than the sum of its proper divisors (3781898899).

380420820781 is a wasteful number, since it uses less digits than its factorization.

380420820781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850995.

The product of its (nonzero) digits is 172032, while the sum is 43.

The spelling of 380420820781 in words is "three hundred eighty billion, four hundred twenty million, eight hundred twenty thousand, seven hundred eighty-one".