86878378 has 4 divisors (see below), whose sum is σ = 130317570. Its totient is φ = 43439188.

The previous prime is 86878373. The next prime is 86878387. The reversal of 86878378 is 87387868.

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

It can be written as a sum of positive squares in only one way, i.e., 79977249 + 6901129 = 8943^2 + 2627^2 .

It is not an unprimeable number, because it can be changed into a prime (86878373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21719593 + ... + 21719596.

Almost surely, 2^86878378 is an apocalyptic number.

86878378 is a deficient number, since it is larger than the sum of its proper divisors (43439192).

86878378 is a wasteful number, since it uses less digits than its factorization.

86878378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43439191.

The product of its digits is 3612672, while the sum is 55.

The square root of 86878378 is about 9320.8571494257. The cubic root of 86878378 is about 442.8981858497.

The spelling of 86878378 in words is "eighty-six million, eight hundred seventy-eight thousand, three hundred seventy-eight".