220718739 has 16 divisors (see below), whose sum is σ = 305118720. Its totient is φ = 141755040.

The previous prime is 220718731. The next prime is 220718749. The reversal of 220718739 is 937817022.

It is not a de Polignac number, because 220718739 - 2³ = 220718731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220718697 and 220718706.

It is not an unprimeable number, because it can be changed into a prime (220718731) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40134 + ... + 45300.

It is an arithmetic number, because the mean of its divisors is an integer number (19069920).

Almost surely, 2^220718739 is an apocalyptic number.

220718739 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

220718739 is a deficient number, since it is larger than the sum of its proper divisors (84399981).

220718739 is a wasteful number, since it uses less digits than its factorization.

220718739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5690.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 220718739 is about 14856.6059044453. The cubic root of 220718739 is about 604.3377668348.

The spelling of 220718739 in words is "two hundred twenty million, seven hundred eighteen thousand, seven hundred thirty-nine".