220545740 has 24 divisors (see below), whose sum is σ = 466483920. Its totient is φ = 87582528.

The previous prime is 220545739. The next prime is 220545757. The reversal of 220545740 is 47545022.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36887 + ... + 42446.

It is an arithmetic number, because the mean of its divisors is an integer number (19436830).

Almost surely, 2^220545740 is an apocalyptic number.

220545740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220545740 is an abundant number, since it is smaller than the sum of its proper divisors (245938180).

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

220545740 is a wasteful number, since it uses less digits than its factorization.

220545740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79481 (or 79479 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 29.

The square root of 220545740 is about 14850.7824709676. The cubic root of 220545740 is about 604.1798325682.

The spelling of 220545740 in words is "two hundred twenty million, five hundred forty-five thousand, seven hundred forty".