2391490 has 16 divisors (see below), whose sum is σ = 4322880. Its totient is φ = 952560.

The previous prime is 2391469. The next prime is 2391491. The reversal of 2391490 is 941932.

It is a happy number.

2391490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2391491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3475 + ... + 4105.

It is an arithmetic number, because the mean of its divisors is an integer number (270180).

2^2391490 is an apocalyptic number.

2391490 is a deficient number, since it is larger than the sum of its proper divisors (1931390).

2391490 is a wasteful number, since it uses less digits than its factorization.

2391490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 2391490 is about 1546.4443087289. Note that the first 3 decimals coincide. The cubic root of 2391490 is about 133.7281560973.

The spelling of 2391490 in words is "two million, three hundred ninety-one thousand, four hundred ninety".