220023240 has 32 divisors (see below), whose sum is σ = 660070080. Its totient is φ = 58672832.

The previous prime is 220023227. The next prime is 220023247. The reversal of 220023240 is 42320022.

It is a super-2 number, since 2×220023240² = 96820452280195200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (220023247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 916644 + ... + 916883.

It is an arithmetic number, because the mean of its divisors is an integer number (20627190).

Almost surely, 2^220023240 is an apocalyptic number.

220023240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220023240 is an abundant number, since it is smaller than the sum of its proper divisors (440046840).

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

220023240 is a wasteful number, since it uses less digits than its factorization.

220023240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1833541 (or 1833537 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 220023240 is about 14833.1803737432. The cubic root of 220023240 is about 603.7023298225.

Adding to 220023240 its reverse (42320022), we get a palindrome (262343262).

The spelling of 220023240 in words is "two hundred twenty million, twenty-three thousand, two hundred forty".