399354406 has 8 divisors (see below), whose sum is σ = 653489064. Its totient is φ = 181524720.

The previous prime is 399354383. The next prime is 399354409. The reversal of 399354406 is 604453993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×399354406² = 318967883183225672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399354409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9076215 + ... + 9076258.

It is an arithmetic number, because the mean of its divisors is an integer number (81686133).

Almost surely, 2^399354406 is an apocalyptic number.

399354406 is a deficient number, since it is larger than the sum of its proper divisors (254134658).

399354406 is a wasteful number, since it uses less digits than its factorization.

399354406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18152486.

The product of its (nonzero) digits is 349920, while the sum is 43.

The square root of 399354406 is about 19983.8536323703. The cubic root of 399354406 is about 736.4096881712.

The spelling of 399354406 in words is "three hundred ninety-nine million, three hundred fifty-four thousand, four hundred six".