897223790 has 32 divisors (see below), whose sum is σ = 1784358720. Its totient is φ = 323090944.

The previous prime is 897223781. The next prime is 897223879. The reversal of 897223790 is 97322798.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 110825 + ... + 118644.

It is an arithmetic number, because the mean of its divisors is an integer number (55761210).

Almost surely, 2^897223790 is an apocalyptic number.

897223790 is a deficient number, since it is larger than the sum of its proper divisors (887134930).

897223790 is a wasteful number, since it uses less digits than its factorization.

897223790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229516.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 897223790 is about 29953.6940960543. The cubic root of 897223790 is about 964.4956208740.

The spelling of 897223790 in words is "eight hundred ninety-seven million, two hundred twenty-three thousand, seven hundred ninety".