897322140 has 288 divisors, whose sum is σ = 3249372672. Its totient is φ = 197568000.

The previous prime is 897322123. The next prime is 897322141. The reversal of 897322140 is 41223798.

897322140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 897322095 and 897322104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (897322141) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1827295 + ... + 1827785.

It is an arithmetic number, because the mean of its divisors is an integer number (11282544).

Almost surely, 2^897322140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897322140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1624686336).

897322140 is an abundant number, since it is smaller than the sum of its proper divisors (2352050532).

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

897322140 is a wasteful number, since it uses less digits than its factorization.

897322140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601 (or 596 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 897322140 is about 29955.3357517488. The cubic root of 897322140 is about 964.5308609407.

It can be divided in two parts, 8973 and 22140, that added together give a palindrome (31113).

The spelling of 897322140 in words is "eight hundred ninety-seven million, three hundred twenty-two thousand, one hundred forty".