86447280 has 40 divisors (see below), whose sum is σ = 267987312. Its totient is φ = 23052544.

The previous prime is 86447279. The next prime is 86447287. The reversal of 86447280 is 8274468.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (86447287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179859 + ... + 180338.

Almost surely, 2^86447280 is an apocalyptic number.

86447280 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

86447280 is an abundant number, since it is smaller than the sum of its proper divisors (181540032).

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

86447280 is a wasteful number, since it uses less digits than its factorization.

86447280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360213 (or 360207 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 86447280 is about 9297.7029421250. The cubic root of 86447280 is about 442.1644044882.

The spelling of 86447280 in words is "eighty-six million, four hundred forty-seven thousand, two hundred eighty".