86777812 has 36 divisors (see below), whose sum is σ = 171032148. Its totient is φ = 38473600.

The previous prime is 86777791. The next prime is 86777813. The reversal of 86777812 is 21877768.

It can be written as a sum of positive squares in 2 ways, for example, as 23001616 + 63776196 = 4796^2 + 7986^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86777813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17658 + ... + 22030.

It is an arithmetic number, because the mean of its divisors is an integer number (4750893).

Almost surely, 2^86777812 is an apocalyptic number.

86777812 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

86777812 is a deficient number, since it is larger than the sum of its proper divisors (84254336).

86777812 is a wasteful number, since it uses less digits than its factorization.

86777812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4440 (or 4427 counting only the distinct ones).

The product of its digits is 263424, while the sum is 46.

The square root of 86777812 is about 9315.4609118390. The cubic root of 86777812 is about 442.7272277165.

The spelling of 86777812 in words is "eighty-six million, seven hundred seventy-seven thousand, eight hundred twelve".