99986540 has 12 divisors (see below), whose sum is σ = 209971776. Its totient is φ = 39994608.

The previous prime is 99986539. The next prime is 99986597. The reversal of 99986540 is 4568999.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 10.

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, 2499644 + ... + 2499683.

It is an arithmetic number, because the mean of its divisors is an integer number (17497648).

Almost surely, 2^99986540 is an apocalyptic number.

It is an amenable number.

99986540 is an abundant number, since it is smaller than the sum of its proper divisors (109985236).

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

99986540 is a wasteful number, since it uses less digits than its factorization.

99986540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999336 (or 4999334 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 99986540 is about 9999.3269773520. The cubic root of 99986540 is about 464.1380571649.

The spelling of 99986540 in words is "ninety-nine million, nine hundred eighty-six thousand, five hundred forty".