889539840 has 288 divisors, whose sum is σ = 3608559360. Its totient is φ = 203268096.

The previous prime is 889539817. The next prime is 889539857. The reversal of 889539840 is 48935988.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a super-2 number, since 2×889539840² = 1582562253894451200, which contains 22 as substring.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240082 + ... + 243758.

It is an arithmetic number, because the mean of its divisors is an integer number (12529720).

Almost surely, 2^889539840 is an apocalyptic number.

889539840 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 889539840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1804279680).

889539840 is an abundant number, since it is smaller than the sum of its proper divisors (2719019520).

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

889539840 is a wasteful number, since it uses less digits than its factorization.

889539840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714 (or 3694 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 54.

The square root of 889539840 is about 29825.1544840928. The cubic root of 889539840 is about 961.7343647577.

The spelling of 889539840 in words is "eight hundred eighty-nine million, five hundred thirty-nine thousand, eight hundred forty".