897218436 has 12 divisors (see below), whose sum is σ = 2093509712. Its totient is φ = 299072808.

The previous prime is 897218381. The next prime is 897218473. The reversal of 897218436 is 634812798.

It is a tau number, because it is divible by the number of its divisors (12).

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 3 ways as a sum of consecutive naturals, for example, 37384090 + ... + 37384113.

Almost surely, 2^897218436 is an apocalyptic number.

It is an amenable number.

897218436 is an abundant number, since it is smaller than the sum of its proper divisors (1196291276).

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

897218436 is a wasteful number, since it uses less digits than its factorization.

897218436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74768210 (or 74768208 counting only the distinct ones).

The product of its digits is 580608, while the sum is 48.

The square root of 897218436 is about 29953.6047246404. The cubic root of 897218436 is about 964.4937023932.

The spelling of 897218436 in words is "eight hundred ninety-seven million, two hundred eighteen thousand, four hundred thirty-six".