396949989 has 8 divisors (see below), whose sum is σ = 530132512. Its totient is φ = 264200400.

The previous prime is 396949981. The next prime is 396950011. The reversal of 396949989 is 989949693.

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

It is not a de Polignac number, because 396949989 - 2³ = 396949981 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396949981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106087 + ... + 109764.

It is an arithmetic number, because the mean of its divisors is an integer number (66266564).

Almost surely, 2^396949989 is an apocalyptic number.

It is an amenable number.

396949989 is a deficient number, since it is larger than the sum of its proper divisors (133182523).

396949989 is a wasteful number, since it uses less digits than its factorization.

396949989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216467.

The product of its digits is 34012224, while the sum is 66.

The square root of 396949989 is about 19923.6038155751. The cubic root of 396949989 is about 734.9287968416.

The spelling of 396949989 in words is "three hundred ninety-six million, nine hundred forty-nine thousand, nine hundred eighty-nine".