87839388 has 72 divisors (see below), whose sum is σ = 273288288. Its totient is φ = 23165568.

The previous prime is 87839371. The next prime is 87839429. The reversal of 87839388 is 88393878.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10131 + ... + 16682.

Almost surely, 2^87839388 is an apocalyptic number.

It is an amenable number.

87839388 is an abundant number, since it is smaller than the sum of its proper divisors (185448900).

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

87839388 is a wasteful number, since it uses less digits than its factorization.

87839388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26843 (or 26838 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 87839388 is about 9372.2669616267. The cubic root of 87839388 is about 444.5252488544.

The spelling of 87839388 in words is "eighty-seven million, eight hundred thirty-nine thousand, three hundred eighty-eight".