1640034 has 48 divisors (see below), whose sum is σ = 4021920. Its totient is φ = 495000.

The previous prime is 1640033. The next prime is 1640053. The reversal of 1640034 is 4300461.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1639989 and 1640016.

It is not an unprimeable number, because it can be changed into a prime (1640033) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6409 + ... + 6659.

It is an arithmetic number, because the mean of its divisors is an integer number (83790).

2^1640034 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640034, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2010960).

1640034 is an abundant number, since it is smaller than the sum of its proper divisors (2381886).

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

1640034 is a wasteful number, since it uses less digits than its factorization.

1640034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1640034 is about 1280.6381221875. The cubic root of 1640034 is about 117.9281857390.

Adding to 1640034 its reverse (4300461), we get a palindrome (5940495).

The spelling of 1640034 in words is "one million, six hundred forty thousand, thirty-four".