889990400 has 216 divisors, whose sum is σ = 2501610720. Its totient is φ = 310763520.

The previous prime is 889990399. The next prime is 889990417. The reversal of 889990400 is 4099988.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1580519 + ... + 1581081.

Almost surely, 2^889990400 is an apocalyptic number.

889990400 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 889990400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250805360).

889990400 is an abundant number, since it is smaller than the sum of its proper divisors (1611620320).

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

889990400 is a wasteful number, since it uses less digits than its factorization.

889990400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 621 (or 602 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 889990400 is about 29832.7068835532. The cubic root of 889990400 is about 961.8967130778.

It can be divided in two parts, 8899 and 90400, that added together give a palindrome (99299).

The spelling of 889990400 in words is "eight hundred eighty-nine million, nine hundred ninety thousand, four hundred".