1640002 has 16 divisors (see below), whose sum is σ = 3028032. Its totient is φ = 648720.

The previous prime is 1639999. The next prime is 1640017. The reversal of 1640002 is 2000461.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4324 + ... + 4687.

It is an arithmetic number, because the mean of its divisors is an integer number (189252).

2^1640002 is an apocalyptic number.

1640002 is a deficient number, since it is larger than the sum of its proper divisors (1388030).

1640002 is a wasteful number, since it uses less digits than its factorization.

1640002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9033.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1640002 is about 1280.6256283551. The cubic root of 1640002 is about 117.9274187373.

Adding to 1640002 its reverse (2000461), we get a palindrome (3640463).

The spelling of 1640002 in words is "one million, six hundred forty thousand, two".