1187897088 has 144 divisors (see below), whose sum is σ = 3660231680. Its totient is φ = 334983168.

The previous prime is 1187897063. The next prime is 1187897089. The reversal of 1187897088 is 8807987811.

It is a super-2 number, since 2×1187897088² = 2822198983357759488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187897089) 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, 423306 + ... + 426102.

Almost surely, 2^1187897088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1187897088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1830115840).

1187897088 is an abundant number, since it is smaller than the sum of its proper divisors (2472334592).

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

1187897088 is an equidigital number, since it uses as much as digits as its factorization.

1187897088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2902 (or 2888 counting only the distinct ones).

The product of its (nonzero) digits is 1806336, while the sum is 57.

The square root of 1187897088 is about 34465.8829569184. The cubic root of 1187897088 is about 1059.0739176265.

The spelling of 1187897088 in words is "one billion, one hundred eighty-seven million, eight hundred ninety-seven thousand, eighty-eight".