396404393 has 32 divisors (see below), whose sum is σ = 514805760. Its totient is φ = 296170560.

The previous prime is 396404389. The next prime is 396404399. The reversal of 396404393 is 393404693.

It is not a de Polignac number, because 396404393 - 2² = 396404389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 396404393.

It is not an unprimeable number, because it can be changed into a prime (396404399) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372380 + ... + 373442.

It is an arithmetic number, because the mean of its divisors is an integer number (16087680).

Almost surely, 2^396404393 is an apocalyptic number.

It is an amenable number.

396404393 is a deficient number, since it is larger than the sum of its proper divisors (118401367).

396404393 is a wasteful number, since it uses less digits than its factorization.

396404393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1277.

The product of its (nonzero) digits is 209952, while the sum is 41.

The square root of 396404393 is about 19909.9069058597. The cubic root of 396404393 is about 734.5919298370.

The spelling of 396404393 in words is "three hundred ninety-six million, four hundred four thousand, three hundred ninety-three".