897945856 has 18 divisors (see below), whose sum is σ = 1792384622. Its totient is φ = 448972800.

The previous prime is 897945847. The next prime is 897945877. The reversal of 897945856 is 658549798.

It can be written as a sum of positive squares in only one way, i.e., 851705856 + 46240000 = 29184^2 + 6800^2 .

It is a junction number, because it is equal to n+sod(n) for n = 897945794 and 897945803.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1753545 + ... + 1754056.

Almost surely, 2^897945856 is an apocalyptic number.

It is an amenable number.

897945856 is a deficient number, since it is larger than the sum of its proper divisors (894438766).

897945856 is an equidigital number, since it uses as much as digits as its factorization.

897945856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3507617 (or 3507603 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 61.

The square root of 897945856 is about 29965.7447095846. The cubic root of 897945856 is about 964.7542864610.

The spelling of 897945856 in words is "eight hundred ninety-seven million, nine hundred forty-five thousand, eight hundred fifty-six".