1200989952 has 108 divisors (see below), whose sum is σ = 3474342144. Its totient is φ = 398991360.

The previous prime is 1200989947. The next prime is 1200989969. The reversal of 1200989952 is 2599890021.

It is a junction number, because it is equal to n+sod(n) for n = 1200989898 and 1200989907.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 881752 + ... + 883112.

Almost surely, 2^1200989952 is an apocalyptic number.

1200989952 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 1200989952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1737171072).

1200989952 is an abundant number, since it is smaller than the sum of its proper divisors (2273352192).

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

1200989952 is a wasteful number, since it uses less digits than its factorization.

1200989952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1766 (or 1749 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 1200989952 is about 34655.3019320277. The cubic root of 1200989952 is about 1062.9507058014.

The spelling of 1200989952 in words is "one billion, two hundred million, nine hundred eighty-nine thousand, nine hundred fifty-two".