86780392 has 16 divisors (see below), whose sum is σ = 167111460. Its totient is φ = 42217344.

The previous prime is 86780339. The next prime is 86780399. The reversal of 86780392 is 29308768.

It can be written as a sum of positive squares in 2 ways, for example, as 86378436 + 401956 = 9294^2 + 634^2 .

It is not an unprimeable number, because it can be changed into a prime (86780399) 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, 146293 + ... + 146884.

Almost surely, 2^86780392 is an apocalyptic number.

It is an amenable number.

86780392 is a deficient number, since it is larger than the sum of its proper divisors (80331068).

86780392 is a wasteful number, since it uses less digits than its factorization.

86780392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293220 (or 293216 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 86780392 is about 9315.5993902701. The cubic root of 86780392 is about 442.7316152625.

The spelling of 86780392 in words is "eighty-six million, seven hundred eighty thousand, three hundred ninety-two".