897636816 has 50 divisors (see below), whose sum is σ = 2598025122. Its totient is φ = 299211840.

The previous prime is 897636767. The next prime is 897636829. The reversal of 897636816 is 618636798.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 892814400 + 4822416 = 29880^2 + 2196^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 345015 + ... + 347606.

Almost surely, 2^897636816 is an apocalyptic number.

It is an amenable number.

897636816 is an abundant number, since it is smaller than the sum of its proper divisors (1700388306).

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

897636816 is a wasteful number, since it uses less digits than its factorization.

897636816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 692641 (or 692626 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 897636816 is about 29960.5877111915. The cubic root of 897636816 is about 964.6435960917.

The spelling of 897636816 in words is "eight hundred ninety-seven million, six hundred thirty-six thousand, eight hundred sixteen".