220697940 has 24 divisors (see below), whose sum is σ = 617954400. Its totient is φ = 58852768.

The previous prime is 220697921. The next prime is 220697941. The reversal of 220697940 is 49796022.

220697940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220697941) 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, 1839090 + ... + 1839209.

It is an arithmetic number, because the mean of its divisors is an integer number (25748100).

Almost surely, 2^220697940 is an apocalyptic number.

220697940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220697940 is an abundant number, since it is smaller than the sum of its proper divisors (397256460).

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

220697940 is a wasteful number, since it uses less digits than its factorization.

220697940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3678311 (or 3678309 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 220697940 is about 14855.9058963094. The cubic root of 220697940 is about 604.3187833748.

The spelling of 220697940 in words is "two hundred twenty million, six hundred ninety-seven thousand, nine hundred forty".