1199408880 has 80 divisors (see below), whose sum is σ = 3756572064. Its totient is φ = 316538880.

The previous prime is 1199408849. The next prime is 1199408887. The reversal of 1199408880 is 888049911.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×1199408880² = 2877163322845708800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1199408887) 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, 2481 + ... + 49040.

Almost surely, 2^1199408880 is an apocalyptic number.

1199408880 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 1199408880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1878286032).

1199408880 is an abundant number, since it is smaller than the sum of its proper divisors (2557163184).

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

1199408880 is a wasteful number, since it uses less digits than its factorization.

1199408880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51634 (or 51628 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 1199408880 is about 34632.4830181147. The cubic root of 1199408880 is about 1062.4840519867.

The spelling of 1199408880 in words is "one billion, one hundred ninety-nine million, four hundred eight thousand, eight hundred eighty".