397617894 has 12 divisors (see below), whose sum is σ = 861505476. Its totient is φ = 132539292.

The previous prime is 397617893. The next prime is 397617919. The reversal of 397617894 is 498716793.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 397617894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397617893) 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 5 ways as a sum of consecutive naturals, for example, 11044924 + ... + 11044959.

It is an arithmetic number, because the mean of its divisors is an integer number (71792123).

Almost surely, 2^397617894 is an apocalyptic number.

397617894 is an abundant number, since it is smaller than the sum of its proper divisors (463887582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

397617894 is a wasteful number, since it uses less digits than its factorization.

397617894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22089891 (or 22089888 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 397617894 is about 19940.3584220545. The cubic root of 397617894 is about 735.3407610533.

The spelling of 397617894 in words is "three hundred ninety-seven million, six hundred seventeen thousand, eight hundred ninety-four".