1668190 has 16 divisors (see below), whose sum is σ = 3133728. Its totient is φ = 638176.

The previous prime is 1668137. The next prime is 1668197. The reversal of 1668190 is 918661.

It is a happy number.

It is a super-2 number, since 2×1668190² = 5565715752200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668197) 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, 3397 + ... + 3856.

It is an arithmetic number, because the mean of its divisors is an integer number (195858).

2^1668190 is an apocalyptic number.

1668190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1668190 is a deficient number, since it is larger than the sum of its proper divisors (1465538).

1668190 is a wasteful number, since it uses less digits than its factorization.

1668190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7283.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 1668190 is about 1291.5842984490. The cubic root of 1668190 is about 118.5992213776.

The spelling of 1668190 in words is "one million, six hundred sixty-eight thousand, one hundred ninety".