397963885 has 8 divisors (see below), whose sum is σ = 520970976. Its totient is φ = 289428240.

The previous prime is 397963883. The next prime is 397963889. The reversal of 397963885 is 588369793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397963885 - 2¹ = 397963883 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397963883) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3617799 + ... + 3617908.

It is an arithmetic number, because the mean of its divisors is an integer number (65121372).

Almost surely, 2^397963885 is an apocalyptic number.

It is an amenable number.

397963885 is a deficient number, since it is larger than the sum of its proper divisors (123007091).

397963885 is a wasteful number, since it uses less digits than its factorization.

397963885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7235723.

The product of its digits is 9797760, while the sum is 58.

The square root of 397963885 is about 19949.0321820383. The cubic root of 397963885 is about 735.5539871422.

It can be divided in two parts, 39796 and 3885, that added together give a square (43681 = 209²).

The spelling of 397963885 in words is "three hundred ninety-seven million, nine hundred sixty-three thousand, eight hundred eighty-five".