1220023000 has 64 divisors (see below), whose sum is σ = 3262708800. Its totient is φ = 418291200.

The previous prime is 1220022989. The next prime is 1220023067. The reversal of 1220023000 is 3200221.

It is a super-2 number, since 2×1220023000² = 2976912241058000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

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, 80145 + ... + 94144.

It is an arithmetic number, because the mean of its divisors is an integer number (50979825).

Almost surely, 2^1220023000 is an apocalyptic number.

1220023000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1220023000 is an abundant number, since it is smaller than the sum of its proper divisors (2042685800).

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

1220023000 is a wasteful number, since it uses less digits than its factorization.

1220023000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174317 (or 174303 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 1220023000 is about 34928.8276356364. The cubic root of 1220023000 is about 1068.5364449110.

Adding to 1220023000 its reverse (3200221), we get a palindrome (1223223221).

The spelling of 1220023000 in words is "one billion, two hundred twenty million, twenty-three thousand".