898784640 has 256 divisors, whose sum is σ = 3428913600. Its totient is φ = 221184000.

The previous prime is 898784633. The next prime is 898784827. The reversal of 898784640 is 46487898.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 222640 + ... + 226640.

Almost surely, 2^898784640 is an apocalyptic number.

898784640 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 898784640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714456800).

898784640 is an abundant number, since it is smaller than the sum of its proper divisors (2530128960).

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

898784640 is a wasteful number, since it uses less digits than its factorization.

898784640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042 (or 4024 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 898784640 is about 29979.7371569532. The cubic root of 898784640 is about 965.0545898763.

The spelling of 898784640 in words is "eight hundred ninety-eight million, seven hundred eighty-four thousand, six hundred forty".