1200023020 has 48 divisors (see below), whose sum is σ = 2972971008. Its totient is φ = 398162880.

The previous prime is 1200023017. The next prime is 1200023021. The reversal of 1200023020 is 203200021.

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

It is a junction number, because it is equal to n+sod(n) for n = 1200022988 and 1200023006.

It is not an unprimeable number, because it can be changed into a prime (1200023021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133912 + ... + 142591.

It is an arithmetic number, because the mean of its divisors is an integer number (61936896).

Almost surely, 2^1200023020 is an apocalyptic number.

1200023020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200023020 is an abundant number, since it is smaller than the sum of its proper divisors (1772947988).

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

1200023020 is a wasteful number, since it uses less digits than its factorization.

1200023020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 276550 (or 276548 counting only the distinct ones).

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

The square root of 1200023020 is about 34641.3484148640. The cubic root of 1200023020 is about 1062.6653642503.

Adding to 1200023020 its reverse (203200021), we get a palindrome (1403223041).

The spelling of 1200023020 in words is "one billion, two hundred million, twenty-three thousand, twenty".