86447640 has 32 divisors (see below), whose sum is σ = 259343280. Its totient is φ = 23052672.

The previous prime is 86447629. The next prime is 86447653. The reversal of 86447640 is 4674468.

It is a congruent number.

It is an unprimeable number.

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, 360079 + ... + 360318.

Almost surely, 2^86447640 is an apocalyptic number.

It is an amenable number.

86447640 is an abundant number, since it is smaller than the sum of its proper divisors (172895640).

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

86447640 is a wasteful number, since it uses less digits than its factorization.

86447640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720411 (or 720407 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 86447640 is about 9297.7223017253. The cubic root of 86447640 is about 442.1650182687.

The spelling of 86447640 in words is "eighty-six million, four hundred forty-seven thousand, six hundred forty".