1199639056 has 80 divisors (see below), whose sum is σ = 2997843840. Its totient is φ = 451261440.

The previous prime is 1199639029. The next prime is 1199639059. The reversal of 1199639056 is 6509369911.

It is a super-2 number, since 2×1199639056² = 2878267729361142272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1199639059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18940 + ... + 52516.

It is an arithmetic number, because the mean of its divisors is an integer number (37473048).

Almost surely, 2^1199639056 is an apocalyptic number.

1199639056 is a gapful number since it is divisible by the number (16) 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 1199639056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1498921920).

1199639056 is an abundant number, since it is smaller than the sum of its proper divisors (1798204784).

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

1199639056 is a wasteful number, since it uses less digits than its factorization.

1199639056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33632 (or 33626 counting only the distinct ones).

The product of its (nonzero) digits is 393660, while the sum is 49.

The square root of 1199639056 is about 34635.8059816716. The cubic root of 1199639056 is about 1062.5520139888.

The spelling of 1199639056 in words is "one billion, one hundred ninety-nine million, six hundred thirty-nine thousand, fifty-six".