2271998490 has 64 divisors (see below), whose sum is σ = 5781632256. Its totient is φ = 569428992.

The previous prime is 2271998459. The next prime is 2271998503. The reversal of 2271998490 is 948991722.

It is a Harshad number since it is a multiple of its sum of digits (51).

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 31 ways as a sum of consecutive naturals, for example, 417024 + ... + 422436.

It is an arithmetic number, because the mean of its divisors is an integer number (90338004).

Almost surely, 2^2271998490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2271998490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2890816128).

2271998490 is an abundant number, since it is smaller than the sum of its proper divisors (3509633766).

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

2271998490 is a wasteful number, since it uses less digits than its factorization.

2271998490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6263.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 2271998490 is about 47665.4853117012. The cubic root of 2271998490 is about 1314.6273990490.

The spelling of 2271998490 in words is "two billion, two hundred seventy-one million, nine hundred ninety-eight thousand, four hundred ninety".