394299405 has 24 divisors (see below), whose sum is σ = 684155160. Its totient is φ = 210076800.

The previous prime is 394299397. The next prime is 394299421. The reversal of 394299405 is 504992493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3090564 + 391208841 = 1758^2 + 19779^2 .

It is not a de Polignac number, because 394299405 - 2³ = 394299397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45955 + ... + 53855.

It is an arithmetic number, because the mean of its divisors is an integer number (28506465).

Almost surely, 2^394299405 is an apocalyptic number.

It is an amenable number.

394299405 is a deficient number, since it is larger than the sum of its proper divisors (289855755).

394299405 is a wasteful number, since it uses less digits than its factorization.

394299405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9021 (or 9018 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 394299405 is about 19856.9737120237. The cubic root of 394299405 is about 733.2893438948.

The spelling of 394299405 in words is "three hundred ninety-four million, two hundred ninety-nine thousand, four hundred five".