86139770 has 16 divisors (see below), whose sum is σ = 158834088. Its totient is φ = 33615360.

The previous prime is 86139751. The next prime is 86139821. The reversal of 86139770 is 7793168.

It can be written as a sum of positive squares in 4 ways, for example, as 50367409 + 35772361 = 7097^2 + 5981^2 .

It is a Harshad number since it is a multiple of its sum of digits (41).

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 in 7 ways as a sum of consecutive naturals, for example, 104639 + ... + 105458.

Almost surely, 2^86139770 is an apocalyptic number.

86139770 is a deficient number, since it is larger than the sum of its proper divisors (72694318).

86139770 is a wasteful number, since it uses less digits than its factorization.

86139770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210145.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 86139770 is about 9281.1513294418. The cubic root of 86139770 is about 441.6394929684.

The spelling of 86139770 in words is "eighty-six million, one hundred thirty-nine thousand, seven hundred seventy".