86278481 has 4 divisors (see below), whose sum is σ = 87460452. Its totient is φ = 85096512.

The previous prime is 86278459. The next prime is 86278483. The reversal of 86278481 is 18487268.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18627856 + 67650625 = 4316^2 + 8225^2 .

It is a cyclic number.

It is not a de Polignac number, because 86278481 - 2²⁶ = 19169617 is a prime.

It is a super-2 number, since 2×86278481² = 14887952567334722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (86278483) 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, 590876 + ... + 591021.

It is an arithmetic number, because the mean of its divisors is an integer number (21865113).

Almost surely, 2^86278481 is an apocalyptic number.

It is an amenable number.

86278481 is a deficient number, since it is larger than the sum of its proper divisors (1181971).

86278481 is a wasteful number, since it uses less digits than its factorization.

86278481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1181970.

The product of its digits is 172032, while the sum is 44.

The square root of 86278481 is about 9288.6210494346. The cubic root of 86278481 is about 441.8764234153.

The spelling of 86278481 in words is "eighty-six million, two hundred seventy-eight thousand, four hundred eighty-one".