897644158 has 32 divisors (see below), whose sum is σ = 1398615840. Its totient is φ = 431861760.

The previous prime is 897644129. The next prime is 897644159. The reversal of 897644158 is 851446798.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897644159) 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 15 ways as a sum of consecutive naturals, for example, 1577298 + ... + 1577866.

It is an arithmetic number, because the mean of its divisors is an integer number (43706745).

Almost surely, 2^897644158 is an apocalyptic number.

897644158 is a deficient number, since it is larger than the sum of its proper divisors (500971682).

897644158 is a wasteful number, since it uses less digits than its factorization.

897644158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its digits is 1935360, while the sum is 52.

The square root of 897644158 is about 29960.7102385775. The cubic root of 897644158 is about 964.6462261064.

The spelling of 897644158 in words is "eight hundred ninety-seven million, six hundred forty-four thousand, one hundred fifty-eight".