396786405 has 16 divisors (see below), whose sum is σ = 668272320. Its totient is φ = 200481408.

The previous prime is 396786373. The next prime is 396786407. The reversal of 396786405 is 504687693.

It is not a de Polignac number, because 396786405 - 2⁵ = 396786373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396786407) 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, 695832 + ... + 696401.

It is an arithmetic number, because the mean of its divisors is an integer number (41767020).

Almost surely, 2^396786405 is an apocalyptic number.

It is an amenable number.

396786405 is a deficient number, since it is larger than the sum of its proper divisors (271485915).

396786405 is a wasteful number, since it uses less digits than its factorization.

396786405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392260.

The product of its (nonzero) digits is 1088640, while the sum is 48.

The square root of 396786405 is about 19919.4981111473. The cubic root of 396786405 is about 734.8278276901.

The spelling of 396786405 in words is "three hundred ninety-six million, seven hundred eighty-six thousand, four hundred five".