397117822 has 32 divisors (see below), whose sum is σ = 656100000. Its totient is φ = 179536896.

The previous prime is 397117751. The next prime is 397117823. The reversal of 397117822 is 228711793.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397117823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96054 + ... + 100102.

It is an arithmetic number, because the mean of its divisors is an integer number (20503125).

Almost surely, 2^397117822 is an apocalyptic number.

397117822 is a deficient number, since it is larger than the sum of its proper divisors (258982178).

397117822 is a wasteful number, since it uses less digits than its factorization.

397117822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4188.

The product of its digits is 42336, while the sum is 40.

The square root of 397117822 is about 19927.8152841700. The cubic root of 397117822 is about 735.0323597828.

The spelling of 397117822 in words is "three hundred ninety-seven million, one hundred seventeen thousand, eight hundred twenty-two".