2091490 has 16 divisors (see below), whose sum is σ = 3787200. Its totient is φ = 831600.

The previous prime is 2091487. The next prime is 2091497. The reversal of 2091490 is 941902.

It is not an unprimeable number, because it can be changed into a prime (2091497) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1465 + ... + 2515.

It is an arithmetic number, because the mean of its divisors is an integer number (236700).

2^2091490 is an apocalyptic number.

2091490 is a deficient number, since it is larger than the sum of its proper divisors (1695710).

2091490 is a wasteful number, since it uses less digits than its factorization.

2091490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2091490 is about 1446.1984649418. The cubic root of 2091490 is about 127.8847024907.

The spelling of 2091490 in words is "two million, ninety-one thousand, four hundred ninety".