220640140 has 36 divisors (see below), whose sum is σ = 538994736. Its totient is φ = 75647712.

The previous prime is 220640129. The next prime is 220640153. The reversal of 220640140 is 41046022.

220640140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111592 + ... + 113551.

It is an arithmetic number, because the mean of its divisors is an integer number (14972076).

Almost surely, 2^220640140 is an apocalyptic number.

220640140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220640140 is an abundant number, since it is smaller than the sum of its proper divisors (318354596).

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

220640140 is a wasteful number, since it uses less digits than its factorization.

220640140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225166 (or 225157 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 220640140 is about 14853.9604146504. The cubic root of 220640140 is about 604.2660224603.

Adding to 220640140 its reverse (41046022), we get a palindrome (261686162).

It can be divided in two parts, 220640 and 140, that added together give a triangular number (220780 = T₆₆₄).

The spelling of 220640140 in words is "two hundred twenty million, six hundred forty thousand, one hundred forty".