396877815 has 12 divisors (see below), whose sum is σ = 687921624. Its totient is φ = 211668144.

The previous prime is 396877813. The next prime is 396877853. The reversal of 396877815 is 518778693.

It is not a de Polignac number, because 396877815 - 2¹ = 396877813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396877813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4409709 + ... + 4409798.

It is an arithmetic number, because the mean of its divisors is an integer number (57326802).

Almost surely, 2^396877815 is an apocalyptic number.

396877815 is a deficient number, since it is larger than the sum of its proper divisors (291043809).

396877815 is a wasteful number, since it uses less digits than its factorization.

396877815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8819518 (or 8819515 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 54.

The square root of 396877815 is about 19921.7924645349. The cubic root of 396877815 is about 734.8842522159.

The spelling of 396877815 in words is "three hundred ninety-six million, eight hundred seventy-seven thousand, eight hundred fifteen".