86261278 has 4 divisors (see below), whose sum is σ = 129391920. Its totient is φ = 43130638.

The previous prime is 86261269. The next prime is 86261291. The reversal of 86261278 is 87216268.

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

It is a self number, because there is not a number n which added to its sum of digits gives 86261278.

It is a congruent number.

It is an unprimeable number.

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, 21565318 + ... + 21565321.

It is an arithmetic number, because the mean of its divisors is an integer number (32347980).

Almost surely, 2^86261278 is an apocalyptic number.

86261278 is a deficient number, since it is larger than the sum of its proper divisors (43130642).

86261278 is a wasteful number, since it uses less digits than its factorization.

86261278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43130641.

The product of its digits is 64512, while the sum is 40.

The square root of 86261278 is about 9287.6949777649. The cubic root of 86261278 is about 441.8470529964.

The spelling of 86261278 in words is "eighty-six million, two hundred sixty-one thousand, two hundred seventy-eight".