396902805 has 16 divisors (see below), whose sum is σ = 683894400. Its totient is φ = 195398208.

The previous prime is 396902777. The next prime is 396902819. The reversal of 396902805 is 508209693.

It is not a de Polignac number, because 396902805 - 2⁶ = 396902741 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1017505 + ... + 1017894.

It is an arithmetic number, because the mean of its divisors is an integer number (42743400).

Almost surely, 2^396902805 is an apocalyptic number.

It is an amenable number.

396902805 is a deficient number, since it is larger than the sum of its proper divisors (286991595).

396902805 is a wasteful number, since it uses less digits than its factorization.

396902805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035420.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 396902805 is about 19922.4196572605. The cubic root of 396902805 is about 734.8996762509.

The spelling of 396902805 in words is "three hundred ninety-six million, nine hundred two thousand, eight hundred five".