396426709 has 24 divisors (see below), whose sum is σ = 469023360. Its totient is φ = 335025936.

The previous prime is 396426691. The next prime is 396426731. The reversal of 396426709 is 907624693.

It is not a de Polignac number, because 396426709 - 2⁵ = 396426677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396426209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1731007 + ... + 1731235.

It is an arithmetic number, because the mean of its divisors is an integer number (19542640).

Almost surely, 2^396426709 is an apocalyptic number.

It is an amenable number.

396426709 is a deficient number, since it is larger than the sum of its proper divisors (72596651).

396426709 is an frugal number, since it uses more digits than its factorization.

396426709 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 367 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 46.

The square root of 396426709 is about 19910.4673224915. The cubic root of 396426709 is about 734.6057144521.

The spelling of 396426709 in words is "three hundred ninety-six million, four hundred twenty-six thousand, seven hundred nine".