640132412 has 48 divisors (see below), whose sum is σ = 1206116352. Its totient is φ = 296493120.

The previous prime is 640132403. The next prime is 640132447. The reversal of 640132412 is 214231046.

640132412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303487 + ... + 1303977.

It is an arithmetic number, because the mean of its divisors is an integer number (25127424).

Almost surely, 2^640132412 is an apocalyptic number.

It is an amenable number.

640132412 is a deficient number, since it is larger than the sum of its proper divisors (565983940).

640132412 is a wasteful number, since it uses less digits than its factorization.

640132412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 936 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 640132412 is about 25300.8381679343. The cubic root of 640132412 is about 861.8333037908.

Adding to 640132412 its reverse (214231046), we get a palindrome (854363458).

The spelling of 640132412 in words is "six hundred forty million, one hundred thirty-two thousand, four hundred twelve".