1640503332 has 72 divisors (see below), whose sum is σ = 4728532536. Its totient is φ = 475075584.

The previous prime is 1640503331. The next prime is 1640503367. The reversal of 1640503332 is 2333050461.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 710009316 + 930494016 = 26646^2 + 30504^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1640503296 and 1640503305.

It is not an unprimeable number, because it can be changed into a prime (1640503331) 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, 95143 + ... + 111054.

It is an arithmetic number, because the mean of its divisors is an integer number (65674063).

Almost surely, 2^1640503332 is an apocalyptic number.

1640503332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1640503332 is an abundant number, since it is smaller than the sum of its proper divisors (3088029204).

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

1640503332 is a wasteful number, since it uses less digits than its factorization.

1640503332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206237 (or 206232 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 27.

The square root of 1640503332 is about 40503.1274348043. The cubic root of 1640503332 is about 1179.3943391893.

Adding to 1640503332 its reverse (2333050461), we get a palindrome (3973553793).

The spelling of 1640503332 in words is "one billion, six hundred forty million, five hundred three thousand, three hundred thirty-two".