2261940 has 24 divisors (see below), whose sum is σ = 6333600. Its totient is φ = 603168.

The previous prime is 2261933. The next prime is 2261993. The reversal of 2261940 is 491622.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261940.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18790 + ... + 18909.

It is an arithmetic number, because the mean of its divisors is an integer number (263900).

2^2261940 is an apocalyptic number.

2261940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2261940 is an abundant number, since it is smaller than the sum of its proper divisors (4071660).

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

2261940 is a wasteful number, since it uses less digits than its factorization.

2261940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37711 (or 37709 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 2261940 is about 1503.9747338303. The cubic root of 2261940 is about 131.2684509208.

The spelling of 2261940 in words is "two million, two hundred sixty-one thousand, nine hundred forty".