396986785 has 16 divisors (see below), whose sum is σ = 535336704. Its totient is φ = 280412352.

The previous prime is 396986767. The next prime is 396986789. The reversal of 396986785 is 587689693.

It is a cyclic number.

It is not a de Polignac number, because 396986785 - 2⁵ = 396986753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396986789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131277 + ... + 134266.

It is an arithmetic number, because the mean of its divisors is an integer number (33458544).

Almost surely, 2^396986785 is an apocalyptic number.

It is an amenable number.

396986785 is a deficient number, since it is larger than the sum of its proper divisors (138349919).

396986785 is a wasteful number, since it uses less digits than its factorization.

396986785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265584.

The product of its digits is 19595520, while the sum is 61.

The square root of 396986785 is about 19924.5272214926. The cubic root of 396986785 is about 734.9515046597.

The spelling of 396986785 in words is "three hundred ninety-six million, nine hundred eighty-six thousand, seven hundred eighty-five".