1640230 has 8 divisors (see below), whose sum is σ = 2952432. Its totient is φ = 656088.

The previous prime is 1640207. The next prime is 1640231. The reversal of 1640230 is 320461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1640231) 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, 82002 + ... + 82021.

It is an arithmetic number, because the mean of its divisors is an integer number (369054).

2^1640230 is an apocalyptic number.

1640230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1640230 is a deficient number, since it is larger than the sum of its proper divisors (1312202).

1640230 is a wasteful number, since it uses less digits than its factorization.

1640230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164030.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1640230 is about 1280.7146442514. The cubic root of 1640230 is about 117.9328834066.

Adding to 1640230 its reverse (320461), we get a palindrome (1960691).

The spelling of 1640230 in words is "one million, six hundred forty thousand, two hundred thirty".