87840715 has 16 divisors (see below), whose sum is σ = 106934400. Its totient is φ = 69264000.

The previous prime is 87840707. The next prime is 87840719. The reversal of 87840715 is 51704878.

It is not a de Polignac number, because 87840715 - 2³ = 87840707 is a prime.

It is a super-3 number, since 3×87840715³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (87840719) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116590 + ... + 117340.

It is an arithmetic number, because the mean of its divisors is an integer number (6683400).

Almost surely, 2^87840715 is an apocalyptic number.

87840715 is a deficient number, since it is larger than the sum of its proper divisors (19093685).

87840715 is a wasteful number, since it uses less digits than its factorization.

87840715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its (nonzero) digits is 62720, while the sum is 40.

The square root of 87840715 is about 9372.3377553308. The cubic root of 87840715 is about 444.5274873416.

The spelling of 87840715 in words is "eighty-seven million, eight hundred forty thousand, seven hundred fifteen".