396672405 has 32 divisors (see below), whose sum is σ = 680711040. Its totient is φ = 196634880.

The previous prime is 396672379. The next prime is 396672427. The reversal of 396672405 is 504276693.

It is not a de Polignac number, because 396672405 - 2⁹ = 396671893 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1975 + ... + 28235.

It is an arithmetic number, because the mean of its divisors is an integer number (21272220).

Almost surely, 2^396672405 is an apocalyptic number.

It is an amenable number.

396672405 is a deficient number, since it is larger than the sum of its proper divisors (284038635).

396672405 is a wasteful number, since it uses less digits than its factorization.

396672405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26341.

The product of its (nonzero) digits is 272160, while the sum is 42.

The square root of 396672405 is about 19916.6363877036. The cubic root of 396672405 is about 734.7574469216.

The spelling of 396672405 in words is "three hundred ninety-six million, six hundred seventy-two thousand, four hundred five".