1662340 has 12 divisors (see below), whose sum is σ = 3490956. Its totient is φ = 664928.

The previous prime is 1662319. The next prime is 1662341. The reversal of 1662340 is 432661.

It can be written as a sum of positive squares in 2 ways, for example, as 298116 + 1364224 = 546^2 + 1168^2 .

It is a d-powerful number, because it can be written as 1 + 6³ + 6³ + 2¹¹ + 3¹³ + 4⁸ + 0 .

It is not an unprimeable number, because it can be changed into a prime (1662341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41539 + ... + 41578.

It is an arithmetic number, because the mean of its divisors is an integer number (290913).

2^1662340 is an apocalyptic number.

1662340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1662340 is an abundant number, since it is smaller than the sum of its proper divisors (1828616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1662340 is a wasteful number, since it uses less digits than its factorization.

1662340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83126 (or 83124 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 1662340 is about 1289.3176489911. The cubic root of 1662340 is about 118.4604246298.

It can be divided in two parts, 1662 and 340, that added together give a palindrome (2002).

The spelling of 1662340 in words is "one million, six hundred sixty-two thousand, three hundred forty".