1200872880 has 120 divisors (see below), whose sum is σ = 4072337568. Its totient is φ = 317104128.

The previous prime is 1200872879. The next prime is 1200872891. The reversal of 1200872880 is 882780021.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 66064 + ... + 82256.

Almost surely, 2^1200872880 is an apocalyptic number.

1200872880 is a gapful number since it is divisible by the number (10) 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 1200872880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2036168784).

1200872880 is an abundant number, since it is smaller than the sum of its proper divisors (2871464688).

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

1200872880 is a wasteful number, since it uses less digits than its factorization.

1200872880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16315 (or 16306 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 36.

The square root of 1200872880 is about 34653.6127986679. The cubic root of 1200872880 is about 1062.9161660151.

The spelling of 1200872880 in words is "one billion, two hundred million, eight hundred seventy-two thousand, eight hundred eighty".