1187890488 has 128 divisors (see below), whose sum is σ = 3585792000. Its totient is φ = 362983680.

The previous prime is 1187890481. The next prime is 1187890493. The reversal of 1187890488 is 8840987811.

It is a happy number.

1187890488 is a `hidden beast` number, since 1 + 1 + 8 + 78 + 90 + 488 = 666.

It is a super-2 number, since 2×1187890488² = 2822167622961756288, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1187890481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122556 + ... + 131892.

It is an arithmetic number, because the mean of its divisors is an integer number (28014000).

Almost surely, 2^1187890488 is an apocalyptic number.

1187890488 is a gapful number since it is divisible by the number (18) 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 1187890488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1792896000).

1187890488 is an abundant number, since it is smaller than the sum of its proper divisors (2397901512).

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

1187890488 is a wasteful number, since it uses less digits than its factorization.

1187890488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9402 (or 9392 counting only the distinct ones).

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

The square root of 1187890488 is about 34465.7872099275. The cubic root of 1187890488 is about 1059.0719562050.

The spelling of 1187890488 in words is "one billion, one hundred eighty-seven million, eight hundred ninety thousand, four hundred eighty-eight".