86881778 has 8 divisors (see below), whose sum is σ = 134526720. Its totient is φ = 42039540.

The previous prime is 86881723. The next prime is 86881789. The reversal of 86881778 is 87718868.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 700598 + ... + 700721.

It is an arithmetic number, because the mean of its divisors is an integer number (16815840).

Almost surely, 2^86881778 is an apocalyptic number.

86881778 is a deficient number, since it is larger than the sum of its proper divisors (47644942).

86881778 is a wasteful number, since it uses less digits than its factorization.

86881778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401352.

The product of its digits is 1204224, while the sum is 53.

The square root of 86881778 is about 9321.0395343009. The cubic root of 86881778 is about 442.9039634062.

The spelling of 86881778 in words is "eighty-six million, eight hundred eighty-one thousand, seven hundred seventy-eight".