380139669 has 128 divisors (see below), whose sum is σ = 774144000. Its totient is φ = 178412544.

The previous prime is 380139637. The next prime is 380139673. The reversal of 380139669 is 966931083.

It is not a de Polignac number, because 380139669 - 2⁵ = 380139637 is a prime.

It is a super-2 number, since 2×380139669² = 289012335894859122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380139679) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 793372 + ... + 793850.

It is an arithmetic number, because the mean of its divisors is an integer number (6048000).

Almost surely, 2^380139669 is an apocalyptic number.

380139669 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

380139669 is an abundant number, since it is smaller than the sum of its proper divisors (394004331).

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

380139669 is a wasteful number, since it uses less digits than its factorization.

380139669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 544 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 380139669 is about 19497.1707947589. The cubic root of 380139669 is about 724.4043742125.

The spelling of 380139669 in words is "three hundred eighty million, one hundred thirty-nine thousand, six hundred sixty-nine".