87278786 has 8 divisors (see below), whose sum is σ = 149620800. Its totient is φ = 37405188.

The previous prime is 87278783. The next prime is 87278797. The reversal of 87278786 is 68787278.

It is a happy number.

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87278783) 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, 3117086 + ... + 3117113.

It is an arithmetic number, because the mean of its divisors is an integer number (18702600).

Almost surely, 2^87278786 is an apocalyptic number.

87278786 is a deficient number, since it is larger than the sum of its proper divisors (62342014).

87278786 is a wasteful number, since it uses less digits than its factorization.

87278786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234208.

The product of its digits is 2107392, while the sum is 53.

The square root of 87278786 is about 9342.3115983144. The cubic root of 87278786 is about 443.5775579131.

The spelling of 87278786 in words is "eighty-seven million, two hundred seventy-eight thousand, seven hundred eighty-six".