86723784 has 96 divisors (see below), whose sum is σ = 278416320. Its totient is φ = 24774336.

The previous prime is 86723773. The next prime is 86723801. The reversal of 86723784 is 48732768.

It is a happy number.

It is a super-2 number, since 2×86723784² = 15042029422557312, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10422 + ... + 16794.

It is an arithmetic number, because the mean of its divisors is an integer number (2900170).

Almost surely, 2^86723784 is an apocalyptic number.

86723784 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 86723784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (139208160).

86723784 is an abundant number, since it is smaller than the sum of its proper divisors (191692536).

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

86723784 is a wasteful number, since it uses less digits than its factorization.

86723784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6401 (or 6385 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 86723784 is about 9312.5605501387. The cubic root of 86723784 is about 442.6353277559.

The spelling of 86723784 in words is "eighty-six million, seven hundred twenty-three thousand, seven hundred eighty-four".