1220783000 has 32 divisors (see below), whose sum is σ = 2856634560. Its totient is φ = 488312800.

The previous prime is 1220782967. The next prime is 1220783021. The reversal of 1220783000 is 3870221.

1220783000 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×1220783000² = 2980622266178000000, which contains 22 as substring.

It is a congruent number.

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, 609392 + ... + 611391.

It is an arithmetic number, because the mean of its divisors is an integer number (89269830).

Almost surely, 2^1220783000 is an apocalyptic number.

1220783000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220783000 is an abundant number, since it is smaller than the sum of its proper divisors (1635851560).

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

1220783000 is a wasteful number, since it uses less digits than its factorization.

1220783000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220804 (or 1220790 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 1220783000 is about 34939.7052076860. The cubic root of 1220783000 is about 1068.7582765566.

The spelling of 1220783000 in words is "one billion, two hundred twenty million, seven hundred eighty-three thousand".