1187849880 has 256 divisors, whose sum is σ = 4590950400. Its totient is φ = 267563520.

The previous prime is 1187849879. The next prime is 1187849917. The reversal of 1187849880 is 889487811.

It is a happy number.

1187849880 is a `hidden beast` number, since 1 + 1 + 8 + 78 + 498 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 535654 + ... + 537866.

It is an arithmetic number, because the mean of its divisors is an integer number (17933400).

Almost surely, 2^1187849880 is an apocalyptic number.

1187849880 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 1187849880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2295475200).

1187849880 is an abundant number, since it is smaller than the sum of its proper divisors (3403100520).

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

1187849880 is a wasteful number, since it uses less digits than its factorization.

1187849880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2311 (or 2301 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 54.

The square root of 1187849880 is about 34465.1980989519. The cubic root of 1187849880 is about 1059.0598879533.

The spelling of 1187849880 in words is "one billion, one hundred eighty-seven million, eight hundred forty-nine thousand, eight hundred eighty".