897761680 has 20 divisors (see below), whose sum is σ = 2087296092. Its totient is φ = 359104640.

The previous prime is 897761677. The next prime is 897761681. The reversal of 897761680 is 86167798.

It can be written as a sum of positive squares in 2 ways, for example, as 157051024 + 740710656 = 12532^2 + 27216^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (897761681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5610931 + ... + 5611090.

Almost surely, 2^897761680 is an apocalyptic number.

897761680 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

897761680 is an abundant number, since it is smaller than the sum of its proper divisors (1189534412).

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

897761680 is a wasteful number, since it uses less digits than its factorization.

897761680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11222034 (or 11222028 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 897761680 is about 29962.6714429805. The cubic root of 897761680 is about 964.6883223000.

The spelling of 897761680 in words is "eight hundred ninety-seven million, seven hundred sixty-one thousand, six hundred eighty".