396783871 has 16 divisors (see below), whose sum is σ = 439956000. Its totient is φ = 354844800.

The previous prime is 396783869. The next prime is 396783883. The reversal of 396783871 is 178387693.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 396783871 - 2¹ = 396783869 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396783851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177541 + ... + 179761.

It is an arithmetic number, because the mean of its divisors is an integer number (27497250).

Almost surely, 2^396783871 is an apocalyptic number.

396783871 is a deficient number, since it is larger than the sum of its proper divisors (43172129).

396783871 is a wasteful number, since it uses less digits than its factorization.

396783871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490.

The product of its digits is 1524096, while the sum is 52.

The square root of 396783871 is about 19919.4345050255. The cubic root of 396783871 is about 734.8262634079.

The spelling of 396783871 in words is "three hundred ninety-six million, seven hundred eighty-three thousand, eight hundred seventy-one".