87378715 has 16 divisors (see below), whose sum is σ = 107332128. Its totient is φ = 68263936.

The previous prime is 87378713. The next prime is 87378721. The reversal of 87378715 is 51787378.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 87378715 - 2¹ = 87378713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87378713) 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, 67464 + ... + 68746.

It is an arithmetic number, because the mean of its divisors is an integer number (6708258).

Almost surely, 2^87378715 is an apocalyptic number.

87378715 is a deficient number, since it is larger than the sum of its proper divisors (19953413).

87378715 is a wasteful number, since it uses less digits than its factorization.

87378715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598.

The product of its digits is 329280, while the sum is 46.

The square root of 87378715 is about 9347.6582629020. The cubic root of 87378715 is about 443.7467832869.

The spelling of 87378715 in words is "eighty-seven million, three hundred seventy-eight thousand, seven hundred fifteen".