381591469 has 24 divisors (see below), whose sum is σ = 481510008. Its totient is φ = 300303360.

The previous prime is 381591461. The next prime is 381591473. The reversal of 381591469 is 964195183.

It can be written as a sum of positive squares in 4 ways, for example, as 21996100 + 359595369 = 4690^2 + 18963^2 .

It is not a de Polignac number, because 381591469 - 2³ = 381591461 is a prime.

It is a super-2 number, since 2×381591469² = 291224098427155922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381591461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28567 + ... + 39739.

It is an arithmetic number, because the mean of its divisors is an integer number (20062917).

Almost surely, 2^381591469 is an apocalyptic number.

It is an amenable number.

381591469 is a deficient number, since it is larger than the sum of its proper divisors (99918539).

381591469 is a wasteful number, since it uses less digits than its factorization.

381591469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11245 (or 11238 counting only the distinct ones).

The product of its digits is 233280, while the sum is 46.

The square root of 381591469 is about 19534.3663577808. The cubic root of 381591469 is about 725.3253990752.

The spelling of 381591469 in words is "three hundred eighty-one million, five hundred ninety-one thousand, four hundred sixty-nine".