1220630540 has 48 divisors (see below), whose sum is σ = 2600488800. Its totient is φ = 481216512.

The previous prime is 1220630533. The next prime is 1220630563. The reversal of 1220630540 is 450360221.

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, 520691 + ... + 523029.

It is an arithmetic number, because the mean of its divisors is an integer number (54176850).

Almost surely, 2^1220630540 is an apocalyptic number.

1220630540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220630540 is an abundant number, since it is smaller than the sum of its proper divisors (1379858260).

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

1220630540 is a wasteful number, since it uses less digits than its factorization.

1220630540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2714 (or 2712 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1220630540 is about 34937.5233810297. The cubic root of 1220630540 is about 1068.7137833446.

Adding to 1220630540 its reverse (450360221), we get a palindrome (1670990761).

The spelling of 1220630540 in words is "one billion, two hundred twenty million, six hundred thirty thousand, five hundred forty".