1200023761872 has 160 divisors (see below), whose sum is σ = 3394010324992. Its totient is φ = 363120164352.

The previous prime is 1200023761831. The next prime is 1200023761883. The reversal of 1200023761872 is 2781673200021.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1200023761872.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25353813 + ... + 25401099.

Almost surely, 2^{1200023761872} is an apocalyptic number.

1200023761872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1200023761872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1697005162496).

1200023761872 is an abundant number, since it is smaller than the sum of its proper divisors (2193986563120).

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

1200023761872 is a wasteful number, since it uses less digits than its factorization.

1200023761872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47985 (or 47979 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 39.

Adding to 1200023761872 its reverse (2781673200021), we get a palindrome (3981696961893).

The spelling of 1200023761872 in words is "one trillion, two hundred billion, twenty-three million, seven hundred sixty-one thousand, eight hundred seventy-two".