86126778 has 12 divisors (see below), whose sum is σ = 186608058. Its totient is φ = 28708920.

The previous prime is 86126759. The next prime is 86126783. The reversal of 86126778 is 87762168.

It can be written as a sum of positive squares in only one way, i.e., 85322169 + 804609 = 9237^2 + 897^2 .

It is a super-2 number, since 2×86126778² = 14835643777322568, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2392393 + ... + 2392428.

Almost surely, 2^86126778 is an apocalyptic number.

86126778 is an abundant number, since it is smaller than the sum of its proper divisors (100481280).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

86126778 is a wasteful number, since it uses less digits than its factorization.

86126778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4784829 (or 4784826 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 86126778 is about 9280.4513898840. The cubic root of 86126778 is about 441.6172884792.

The spelling of 86126778 in words is "eighty-six million, one hundred twenty-six thousand, seven hundred seventy-eight".