87858778 has 8 divisors (see below), whose sum is σ = 150615072. Its totient is φ = 37653756.

The previous prime is 87858773. The next prime is 87858779. The reversal of 87858778 is 87785878.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (87858773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3137800 + ... + 3137827.

It is an arithmetic number, because the mean of its divisors is an integer number (18826884).

Almost surely, 2^87858778 is an apocalyptic number.

87858778 is a deficient number, since it is larger than the sum of its proper divisors (62756294).

87858778 is a wasteful number, since it uses less digits than its factorization.

87858778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6275636.

The product of its digits is 7024640, while the sum is 58.

The square root of 87858778 is about 9373.3013394428. The cubic root of 87858778 is about 444.5579551783.

Subtracting from 87858778 its reverse (87785878), we obtain a square (72900 = 270²).

The spelling of 87858778 in words is "eighty-seven million, eight hundred fifty-eight thousand, seven hundred seventy-eight".