381406599 has 24 divisors (see below), whose sum is σ = 632396960. Its totient is φ = 216986688.

The previous prime is 381406591. The next prime is 381406601. The reversal of 381406599 is 995604183.

It is a happy number.

It is not a de Polignac number, because 381406599 - 2³ = 381406591 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381406591) 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, 1209 + ... + 27645.

Almost surely, 2^381406599 is an apocalyptic number.

381406599 is a deficient number, since it is larger than the sum of its proper divisors (250990361).

381406599 is a wasteful number, since it uses less digits than its factorization.

381406599 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26679 (or 26676 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 45.

The square root of 381406599 is about 19529.6338675358. The cubic root of 381406599 is about 725.2082471141.

The spelling of 381406599 in words is "three hundred eighty-one million, four hundred six thousand, five hundred ninety-nine".