889280640 has 256 divisors, whose sum is σ = 3212265600. Its totient is φ = 232427520.

The previous prime is 889280633. The next prime is 889280641. The reversal of 889280640 is 46082988.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (889280641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 915355 + ... + 916325.

Almost surely, 2^889280640 is an apocalyptic number.

889280640 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 889280640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606132800).

889280640 is an abundant number, since it is smaller than the sum of its proper divisors (2322984960).

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

889280640 is a wasteful number, since it uses less digits than its factorization.

889280640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052 (or 1034 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 889280640 is about 29820.8088421491. The cubic root of 889280640 is about 961.6409435106.

The spelling of 889280640 in words is "eight hundred eighty-nine million, two hundred eighty thousand, six hundred forty".