1187287280 has 20 divisors (see below), whose sum is σ = 2760443112. Its totient is φ = 474914880.

The previous prime is 1187287261. The next prime is 1187287303. The reversal of 1187287280 is 827827811.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7420466 + ... + 7420625.

Almost surely, 2^1187287280 is an apocalyptic number.

1187287280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1187287280 is an abundant number, since it is smaller than the sum of its proper divisors (1573155832).

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

1187287280 is a wasteful number, since it uses less digits than its factorization.

1187287280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14841104 (or 14841098 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 44.

The square root of 1187287280 is about 34457.0352758330. The cubic root of 1187287280 is about 1058.8926611023.

The spelling of 1187287280 in words is "one billion, one hundred eighty-seven million, two hundred eighty-seven thousand, two hundred eighty".