396403969 has 8 divisors (see below), whose sum is σ = 435980160. Its totient is φ = 358125456.

The previous prime is 396403967. The next prime is 396403979. The reversal of 396403969 is 969304693.

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

It is not a de Polignac number, because 396403969 - 2¹ = 396403967 is a prime.

It is a super-2 number, since 2×396403969² = 314272213277905922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396403963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 323779 + ... + 325000.

It is an arithmetic number, because the mean of its divisors is an integer number (54497520).

Almost surely, 2^396403969 is an apocalyptic number.

It is an amenable number.

396403969 is a deficient number, since it is larger than the sum of its proper divisors (39576191).

396403969 is a wasteful number, since it uses less digits than its factorization.

396403969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 648839.

The product of its (nonzero) digits is 944784, while the sum is 49.

The square root of 396403969 is about 19909.8962578915. The cubic root of 396403969 is about 734.5916679268.

The spelling of 396403969 in words is "three hundred ninety-six million, four hundred three thousand, nine hundred sixty-nine".