1640324112 has 160 divisors (see below), whose sum is σ = 5156812800. Its totient is φ = 438856704.

The previous prime is 1640324107. The next prime is 1640324113. The reversal of 1640324112 is 2114230461.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (1640324113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 566733 + ... + 569619.

It is an arithmetic number, because the mean of its divisors is an integer number (32230080).

Almost surely, 2^1640324112 is an apocalyptic number.

1640324112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1640324112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2578406400).

1640324112 is an abundant number, since it is smaller than the sum of its proper divisors (3516488688).

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

1640324112 is a wasteful number, since it uses less digits than its factorization.

1640324112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013 (or 3007 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 1640324112 is about 40500.9149526279. The cubic root of 1640324112 is about 1179.3513892103.

Adding to 1640324112 its reverse (2114230461), we get a palindrome (3754554573).

The spelling of 1640324112 in words is "one billion, six hundred forty million, three hundred twenty-four thousand, one hundred twelve".