380402838621 has 20 divisors (see below), whose sum is σ = 611968101052. Its totient is φ = 234094053888.

The previous prime is 380402838523. The next prime is 380402838623. The reversal of 380402838621 is 126838204083.

It can be written as a sum of positive squares in 2 ways, for example, as 37282203396 + 343120635225 = 193086^2 + 585765^2 .

It is not a de Polignac number, because 380402838621 - 2¹⁰ = 380402837597 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380402838623) 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 19 ways as a sum of consecutive naturals, for example, 180627076 + ... + 180629181.

Almost surely, 2^380402838621 is an apocalyptic number.

It is an amenable number.

380402838621 is a deficient number, since it is larger than the sum of its proper divisors (231565262431).

380402838621 is a wasteful number, since it uses less digits than its factorization.

380402838621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361256282 (or 361256273 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The spelling of 380402838621 in words is "three hundred eighty billion, four hundred two million, eight hundred thirty-eight thousand, six hundred twenty-one".