897619840 has 192 divisors, whose sum is σ = 2389994640. Its totient is φ = 322043904.

The previous prime is 897619829. The next prime is 897619903. The reversal of 897619840 is 48916798.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 4650784 + ... + 4650976.

Almost surely, 2^897619840 is an apocalyptic number.

897619840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 897619840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194997320).

897619840 is an abundant number, since it is smaller than the sum of its proper divisors (1492374800).

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

897619840 is a wasteful number, since it uses less digits than its factorization.

897619840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 281 (or 256 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 897619840 is about 29960.3044043281. The cubic root of 897619840 is about 964.6375149786.

The spelling of 897619840 in words is "eight hundred ninety-seven million, six hundred nineteen thousand, eight hundred forty".