1968490 has 16 divisors (see below), whose sum is σ = 3580200. Its totient is φ = 779200.

The previous prime is 1968487. The next prime is 1968521. The reversal of 1968490 is 948691.

It can be written as a sum of positive squares in 4 ways, for example, as 1968409 + 81 = 1403^2 + 9^2 .

It is an Ulam 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, 36 + ... + 1984.

2^1968490 is an apocalyptic number.

1968490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1968490 is a deficient number, since it is larger than the sum of its proper divisors (1611710).

1968490 is a wasteful number, since it uses less digits than its factorization.

1968490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 1968490 is about 1403.0288664172. The cubic root of 1968490 is about 125.3269308510.

The spelling of 1968490 in words is "one million, nine hundred sixty-eight thousand, four hundred ninety".