1240231220 has 24 divisors (see below), whose sum is σ = 2605311744. Its totient is φ = 495935136.

The previous prime is 1240231207. The next prime is 1240231247. The reversal of 1240231220 is 221320421.

It is a congruent 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, 70997 + ... + 86723.

It is an arithmetic number, because the mean of its divisors is an integer number (108554656).

Almost surely, 2^1240231220 is an apocalyptic number.

1240231220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1240231220 is an abundant number, since it is smaller than the sum of its proper divisors (1365080524).

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

1240231220 is a wasteful number, since it uses less digits than its factorization.

1240231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19679 (or 19677 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 1240231220 is about 35216.9166736669. The cubic root of 1240231220 is about 1074.4038432414.

Adding to 1240231220 its reverse (221320421), we get a palindrome (1461551641).

The spelling of 1240231220 in words is "one billion, two hundred forty million, two hundred thirty-one thousand, two hundred twenty".