1287838332 has 288 divisors, whose sum is σ = 4027054080. Its totient is φ = 355449600.

The previous prime is 1287838273. The next prime is 1287838427. The reversal of 1287838332 is 2338387821.

1287838332 is a `hidden beast` number, since 1 + 287 + 8 + 38 + 332 = 666.

Its product of digits (387072) is a multiple of the sum of its prime divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 41543157 + ... + 41543187.

Almost surely, 2^1287838332 is an apocalyptic number.

1287838332 is a gapful number since it is divisible by the number (12) 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 1287838332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2013527040).

1287838332 is an abundant number, since it is smaller than the sum of its proper divisors (2739215748).

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

1287838332 is a wasteful number, since it uses less digits than its factorization.

1287838332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 64 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1287838332 is about 35886.4644678185. The cubic root of 1287838332 is about 1087.9788407343.

The spelling of 1287838332 in words is "one billion, two hundred eighty-seven million, eight hundred thirty-eight thousand, three hundred thirty-two".