396605889 has 18 divisors (see below), whose sum is σ = 594888450. Its totient is φ = 264399552.

The previous prime is 396605873. The next prime is 396605959. The reversal of 396605889 is 988506693.

It can be written as a sum of positive squares in only one way, i.e., 262440000 + 134165889 = 16200^2 + 11583^2 .

It is not a de Polignac number, because 396605889 - 2⁴ = 396605873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (396605819) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 23664 + ... + 36785.

Almost surely, 2^396605889 is an apocalyptic number.

It is an amenable number.

396605889 is a deficient number, since it is larger than the sum of its proper divisors (198282561).

396605889 is an frugal number, since it uses more digits than its factorization.

396605889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60473 (or 60452 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The square root of 396605889 is about 19914.9664574159. The cubic root of 396605889 is about 734.7163753659.

The spelling of 396605889 in words is "three hundred ninety-six million, six hundred five thousand, eight hundred eighty-nine".