640325022 has 16 divisors (see below), whose sum is σ = 1292620032. Its totient is φ = 211446680.

The previous prime is 640324981. The next prime is 640325029. The reversal of 640325022 is 220523046.

640325022 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 2×640325022² = 820032267598600968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 640324983 and 640325001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640325029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498054 + ... + 499337.

It is an arithmetic number, because the mean of its divisors is an integer number (80788752).

Almost surely, 2^640325022 is an apocalyptic number.

640325022 is an abundant number, since it is smaller than the sum of its proper divisors (652295010).

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

640325022 is a wasteful number, since it uses less digits than its factorization.

640325022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 997503.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 640325022 is about 25304.6442772863. The cubic root of 640325022 is about 861.9197343809.

Adding to 640325022 its reverse (220523046), we get a palindrome (860848068).

The spelling of 640325022 in words is "six hundred forty million, three hundred twenty-five thousand, twenty-two".