396909418 has 4 divisors (see below), whose sum is σ = 595364130. Its totient is φ = 198454708.

The previous prime is 396909347. The next prime is 396909419. The reversal of 396909418 is 814909693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 376088449 + 20820969 = 19393^2 + 4563^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (396909419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99227353 + ... + 99227356.

Almost surely, 2^396909418 is an apocalyptic number.

396909418 is a deficient number, since it is larger than the sum of its proper divisors (198454712).

396909418 is a wasteful number, since it uses less digits than its factorization.

396909418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198454711.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 396909418 is about 19922.5856253650. The cubic root of 396909418 is about 734.9037577410.

The spelling of 396909418 in words is "three hundred ninety-six million, nine hundred nine thousand, four hundred eighteen".