381969455 has 12 divisors (see below), whose sum is σ = 533198520. Its totient is φ = 261921744.

The previous prime is 381969439. The next prime is 381969499. The reversal of 381969455 is 554969183.

It is a happy number.

It is not a de Polignac number, because 381969455 - 2⁴ = 381969439 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 779285 + ... + 779774.

It is an arithmetic number, because the mean of its divisors is an integer number (44433210).

Almost surely, 2^381969455 is an apocalyptic number.

381969455 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

381969455 is a deficient number, since it is larger than the sum of its proper divisors (151229065).

381969455 is a wasteful number, since it uses less digits than its factorization.

381969455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559078 (or 1559071 counting only the distinct ones).

The product of its digits is 1166400, while the sum is 50.

The square root of 381969455 is about 19544.0388609929. The cubic root of 381969455 is about 725.5648107621.

The spelling of 381969455 in words is "three hundred eighty-one million, nine hundred sixty-nine thousand, four hundred fifty-five".