1220544140 has 24 divisors (see below), whose sum is σ = 2565525312. Its totient is φ = 487763840.

The previous prime is 1220544137. The next prime is 1220544179. The reversal of 1220544140 is 414450221.

It is a super-3 number, since 3×1220544140³ (a number of 28 digits) contains 333 as substring.

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, 5876 + ... + 49755.

It is an arithmetic number, because the mean of its divisors is an integer number (106896888).

Almost surely, 2^1220544140 is an apocalyptic number.

1220544140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220544140 is an abundant number, since it is smaller than the sum of its proper divisors (1344981172).

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

1220544140 is a wasteful number, since it uses less digits than its factorization.

1220544140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56737 (or 56735 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1220544140 is about 34936.2868662369. The cubic root of 1220544140 is about 1068.6885671288.

Adding to 1220544140 its reverse (414450221), we get a palindrome (1634994361).

The spelling of 1220544140 in words is "one billion, two hundred twenty million, five hundred forty-four thousand, one hundred forty".