381445399 has 8 divisors (see below), whose sum is σ = 392087952. Its totient is φ = 370930560.

The previous prime is 381445397. The next prime is 381445411. The reversal of 381445399 is 993544183.

It is a happy number.

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 381445399 - 2¹ = 381445397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381445397) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25857 + ... + 37834.

It is an arithmetic number, because the mean of its divisors is an integer number (49010994).

Almost surely, 2^381445399 is an apocalyptic number.

381445399 is a deficient number, since it is larger than the sum of its proper divisors (10642553).

381445399 is a wasteful number, since it uses less digits than its factorization.

381445399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63857.

The product of its digits is 466560, while the sum is 46.

The square root of 381445399 is about 19530.6272044704. The cubic root of 381445399 is about 725.2328377793.

The spelling of 381445399 in words is "three hundred eighty-one million, four hundred forty-five thousand, three hundred ninety-nine".