86780782 has 8 divisors (see below), whose sum is σ = 142004952. Its totient is φ = 39445800.

The previous prime is 86780777. The next prime is 86780783. The reversal of 86780782 is 28708768.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86780783) 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, 1972269 + ... + 1972312.

It is an arithmetic number, because the mean of its divisors is an integer number (17750619).

Almost surely, 2^86780782 is an apocalyptic number.

86780782 is a deficient number, since it is larger than the sum of its proper divisors (55224170).

86780782 is a wasteful number, since it uses less digits than its factorization.

86780782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3944594.

The product of its (nonzero) digits is 301056, while the sum is 46.

The square root of 86780782 is about 9315.6203228771. The cubic root of 86780782 is about 442.7322784887.

The spelling of 86780782 in words is "eighty-six million, seven hundred eighty thousand, seven hundred eighty-two".