2291461940 has 72 divisors (see below), whose sum is σ = 5299862400. Its totient is φ = 830529216.

The previous prime is 2291461903. The next prime is 2291462021. The reversal of 2291461940 is 491641922.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 2291461894 and 2291461903.

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, 159161 + ... + 172959.

It is an arithmetic number, because the mean of its divisors is an integer number (73609200).

Almost surely, 2^2291461940 is an apocalyptic number.

2291461940 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 2291461940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2649931200).

2291461940 is an abundant number, since it is smaller than the sum of its proper divisors (3008400460).

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

2291461940 is a wasteful number, since it uses less digits than its factorization.

2291461940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13869 (or 13848 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2291461940 is about 47869.2170397637. The cubic root of 2291461940 is about 1318.3707209033.

The spelling of 2291461940 in words is "two billion, two hundred ninety-one million, four hundred sixty-one thousand, nine hundred forty".