640183200 has 144 divisors (see below), whose sum is σ = 2098303200. Its totient is φ = 169528320.

The previous prime is 640183189. The next prime is 640183211. The reversal of 640183200 is 2381046.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (640183189) and next prime (640183211).

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 375951 + ... + 377649.

It is an arithmetic number, because the mean of its divisors is an integer number (14571550).

Almost surely, 2^640183200 is an apocalyptic number.

640183200 is a gapful number since it is divisible by the number (60) 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 640183200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1049151600).

640183200 is an abundant number, since it is smaller than the sum of its proper divisors (1458120000).

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

640183200 is a wasteful number, since it uses less digits than its factorization.

640183200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879 (or 1866 counting only the distinct ones).

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

The square root of 640183200 is about 25301.8418301909. The cubic root of 640183200 is about 861.8560957588.

The spelling of 640183200 in words is "six hundred forty million, one hundred eighty-three thousand, two hundred".