87389678 has 4 divisors (see below), whose sum is σ = 131084520. Its totient is φ = 43694838.

The previous prime is 87389677. The next prime is 87389689. The reversal of 87389678 is 87698378.

It is a semiprime because it is the product of two primes.

It is a super-3 number, since 3×87389678³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87389677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21847418 + ... + 21847421.

It is an arithmetic number, because the mean of its divisors is an integer number (32771130).

Almost surely, 2^87389678 is an apocalyptic number.

87389678 is a deficient number, since it is larger than the sum of its proper divisors (43694842).

87389678 is a wasteful number, since it uses less digits than its factorization.

87389678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43694841.

The product of its digits is 4064256, while the sum is 56.

The square root of 87389678 is about 9348.2446480609. The cubic root of 87389678 is about 443.7653407908.

The spelling of 87389678 in words is "eighty-seven million, three hundred eighty-nine thousand, six hundred seventy-eight".