640602600 has 288 divisors, whose sum is σ = 2260703520. Its totient is φ = 148800000.

The previous prime is 640602587. The next prime is 640602607. The reversal of 640602600 is 6206046.

640602600 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×640602600² = 820743382253520000, which contains 22 as substring.

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 (640602607) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6342550 + ... + 6342650.

It is an arithmetic number, because the mean of its divisors is an integer number (7849665).

Almost surely, 2^640602600 is an apocalyptic number.

640602600 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 640602600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1130351760).

640602600 is an abundant number, since it is smaller than the sum of its proper divisors (1620100920).

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

640602600 is a wasteful number, since it uses less digits than its factorization.

640602600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 640602600 is about 25310.1284074182. The cubic root of 640602600 is about 862.0442624903.

Adding to 640602600 its reverse (6206046), we get a palindrome (646808646).

The spelling of 640602600 in words is "six hundred forty million, six hundred two thousand, six hundred".