86777720 has 16 divisors (see below), whose sum is σ = 195249960. Its totient is φ = 34711072.

The previous prime is 86777701. The next prime is 86777767. The reversal of 86777720 is 2777768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1084682 + ... + 1084761.

Almost surely, 2^86777720 is an apocalyptic number.

It is an amenable number.

86777720 is an abundant number, since it is smaller than the sum of its proper divisors (108472240).

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

86777720 is a wasteful number, since it uses less digits than its factorization.

86777720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2169454 (or 2169450 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 44.

The square root of 86777720 is about 9315.4559738104. The cubic root of 86777720 is about 442.7270712598.

It can be divided in two parts, 867 and 77720, that added together give a palindrome (78587).

The spelling of 86777720 in words is "eighty-six million, seven hundred seventy-seven thousand, seven hundred twenty".