86747780 has 48 divisors (see below), whose sum is σ = 209091456. Its totient is φ = 29614080.

The previous prime is 86747761. The next prime is 86747783. The reversal of 86747780 is 8774768.

It is not an unprimeable number, because it can be changed into a prime (86747783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34775 + ... + 37185.

It is an arithmetic number, because the mean of its divisors is an integer number (4356072).

Almost surely, 2^86747780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86747780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104545728).

86747780 is an abundant number, since it is smaller than the sum of its proper divisors (122343676).

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

86747780 is a wasteful number, since it uses less digits than its factorization.

86747780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2684 (or 2682 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 47.

The square root of 86747780 is about 9313.8488284919. The cubic root of 86747780 is about 442.6761489215.

The spelling of 86747780 in words is "eighty-six million, seven hundred forty-seven thousand, seven hundred eighty".