1220263372 has 12 divisors (see below), whose sum is σ = 2247853720. Its totient is φ = 578019456.

The previous prime is 1220263339. The next prime is 1220263379. The reversal of 1220263372 is 2733620221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220263372.

It is not an unprimeable number, because it can be changed into a prime (1220263379) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8027973 + ... + 8028124.

Almost surely, 2^1220263372 is an apocalyptic number.

It is an amenable number.

1220263372 is a deficient number, since it is larger than the sum of its proper divisors (1027590348).

1220263372 is a wasteful number, since it uses less digits than its factorization.

1220263372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16056120 (or 16056118 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 1220263372 is about 34932.2683489063. The cubic root of 1220263372 is about 1068.6066155488.

Adding to 1220263372 its reverse (2733620221), we get a palindrome (3953883593).

The spelling of 1220263372 in words is "one billion, two hundred twenty million, two hundred sixty-three thousand, three hundred seventy-two".