1220433240 has 64 divisors (see below), whose sum is σ = 3942943200. Its totient is φ = 300413952.

The previous prime is 1220433239. The next prime is 1220433257. The reversal of 1220433240 is 423340221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 389605 + ... + 392724.

Almost surely, 2^1220433240 is an apocalyptic number.

1220433240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220433240 is an abundant number, since it is smaller than the sum of its proper divisors (2722509960).

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

1220433240 is a wasteful number, since it uses less digits than its factorization.

1220433240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782356 (or 782352 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 1220433240 is about 34934.6996552139. The cubic root of 1220433240 is about 1068.6561987372.

Adding to 1220433240 its reverse (423340221), we get a palindrome (1643773461).

The spelling of 1220433240 in words is "one billion, two hundred twenty million, four hundred thirty-three thousand, two hundred forty".