2261990 has 8 divisors (see below), whose sum is σ = 4071600. Its totient is φ = 904792.

The previous prime is 2261933. The next prime is 2261993. The reversal of 2261990 is 991622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113090 + ... + 113109.

It is an arithmetic number, because the mean of its divisors is an integer number (508950).

2^2261990 is an apocalyptic number.

2261990 is a deficient number, since it is larger than the sum of its proper divisors (1809610).

2261990 is a wasteful number, since it uses less digits than its factorization.

2261990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226206.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 2261990 is about 1503.9913563581. The cubic root of 2261990 is about 131.2694181398.

The spelling of 2261990 in words is "two million, two hundred sixty-one thousand, nine hundred ninety".