1220986500 has 48 divisors (see below), whose sum is σ = 3555517056. Its totient is φ = 325596000.

The previous prime is 1220986489. The next prime is 1220986513. The reversal of 1220986500 is 56890221.

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, 405496 + ... + 408495.

It is an arithmetic number, because the mean of its divisors is an integer number (74073272).

Almost surely, 2^1220986500 is an apocalyptic number.

1220986500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220986500 is an abundant number, since it is smaller than the sum of its proper divisors (2334530556).

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

1220986500 is a wasteful number, since it uses less digits than its factorization.

1220986500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814013 (or 814001 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 1220986500 is about 34942.6172459935. The cubic root of 1220986500 is about 1068.8176592712.

The spelling of 1220986500 in words is "one billion, two hundred twenty million, nine hundred eighty-six thousand, five hundred".