2281398840 has 288 divisors, whose sum is σ = 8674501680. Its totient is φ = 518482944.

The previous prime is 2281398829. The next prime is 2281398863. The reversal of 2281398840 is 488931822.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4991892 + ... + 4992348.

Almost surely, 2^2281398840 is an apocalyptic number.

2281398840 is a gapful number since it is divisible by the number (20) 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 2281398840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4337250840).

2281398840 is an abundant number, since it is smaller than the sum of its proper divisors (6393102840).

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

2281398840 is a wasteful number, since it uses less digits than its factorization.

2281398840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771 (or 757 counting only the distinct ones).

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

The square root of 2281398840 is about 47763.9910392756. The cubic root of 2281398840 is about 1316.4379860997.

The spelling of 2281398840 in words is "two billion, two hundred eighty-one million, three hundred ninety-eight thousand, eight hundred forty".