2291992 has 8 divisors (see below), whose sum is σ = 4297500. Its totient is φ = 1145992.

The previous prime is 2291987. The next prime is 2291999. The reversal of 2291992 is 2991922.

2291992 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2291999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143242 + ... + 143257.

2^2291992 is an apocalyptic number.

It is an amenable number.

2291992 is a deficient number, since it is larger than the sum of its proper divisors (2005508).

2291992 is a wasteful number, since it uses less digits than its factorization.

2291992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286505 (or 286501 counting only the distinct ones).

The product of its digits is 5832, while the sum is 34.

The square root of 2291992 is about 1513.9326272989. The cubic root of 2291992 is about 131.8472368051.

The spelling of 2291992 in words is "two million, two hundred ninety-one thousand, nine hundred ninety-two".