87840356 has 12 divisors (see below), whose sum is σ = 153993840. Its totient is φ = 43842120.

The previous prime is 87840341. The next prime is 87840359. The reversal of 87840356 is 65304878.

It is a happy number.

It is a super-3 number, since 3×87840356³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (87840359) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 16946 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (12832820).

Almost surely, 2^87840356 is an apocalyptic number.

It is an amenable number.

87840356 is a deficient number, since it is larger than the sum of its proper divisors (66153484).

87840356 is a wasteful number, since it uses less digits than its factorization.

87840356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39034 (or 39032 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 87840356 is about 9372.3186032059. The cubic root of 87840356 is about 444.5268817546.

The spelling of 87840356 in words is "eighty-seven million, eight hundred forty thousand, three hundred fifty-six".