396408099 has 16 divisors (see below), whose sum is σ = 542085632. Its totient is φ = 257529888.

The previous prime is 396408071. The next prime is 396408119. The reversal of 396408099 is 990804693.

It is a happy number.

It is a Cunningham number, because it is equal to 19910²-1.

It is not a de Polignac number, because 396408099 - 2⁷ = 396407971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396408899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56409 + ... + 63045.

It is an arithmetic number, because the mean of its divisors is an integer number (33880352).

Almost surely, 2^396408099 is an apocalyptic number.

396408099 is a deficient number, since it is larger than the sum of its proper divisors (145677533).

396408099 is a wasteful number, since it uses less digits than its factorization.

396408099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7146.

The product of its (nonzero) digits is 419904, while the sum is 48.

The square root of 396408099 is about 19909.9999748870. Note that the first 4 decimals coincide. The cubic root of 396408099 is about 734.5942190727.

The spelling of 396408099 in words is "three hundred ninety-six million, four hundred eight thousand, ninety-nine".