1192889880 has 288 divisors, whose sum is σ = 4799489760. Its totient is φ = 251596800.

The previous prime is 1192889843. The next prime is 1192889899. The reversal of 1192889880 is 889882911.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 424480 + ... + 427280.

It is an arithmetic number, because the mean of its divisors is an integer number (16664895).

Almost surely, 2^1192889880 is an apocalyptic number.

1192889880 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 1192889880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2399744880).

1192889880 is an abundant number, since it is smaller than the sum of its proper divisors (3606599880).

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

1192889880 is a wasteful number, since it uses less digits than its factorization.

1192889880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2851 (or 2831 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 54.

The square root of 1192889880 is about 34538.2379399992. The cubic root of 1192889880 is about 1060.5556242151. Note that the first 3 decimals are identical.

The spelling of 1192889880 in words is "one billion, one hundred ninety-two million, eight hundred eighty-nine thousand, eight hundred eighty".