396781215 has 16 divisors (see below), whose sum is σ = 635762400. Its totient is φ = 211312512.

The previous prime is 396781163. The next prime is 396781223. The reversal of 396781215 is 512187693.

It is a de Polignac number, because none of the positive numbers 2^k-396781215 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8020 + ... + 29289.

It is an arithmetic number, because the mean of its divisors is an integer number (39735150).

Almost surely, 2^396781215 is an apocalyptic number.

396781215 is a deficient number, since it is larger than the sum of its proper divisors (238981185).

396781215 is a wasteful number, since it uses less digits than its factorization.

396781215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38026.

The product of its digits is 90720, while the sum is 42.

The square root of 396781215 is about 19919.3678363546. The cubic root of 396781215 is about 734.8246238059.

The spelling of 396781215 in words is "three hundred ninety-six million, seven hundred eighty-one thousand, two hundred fifteen".