99986040 has 192 divisors, whose sum is σ = 405250560. Its totient is φ = 20770560.

The previous prime is 99986039. The next prime is 99986053. The reversal of 99986040 is 4068999.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25917 + ... + 29523.

It is an arithmetic number, because the mean of its divisors is an integer number (2110680).

Almost surely, 2^99986040 is an apocalyptic number.

99986040 is a gapful number since it is divisible by the number (90) 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 99986040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202625280).

99986040 is an abundant number, since it is smaller than the sum of its proper divisors (305264520).

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

99986040 is a wasteful number, since it uses less digits than its factorization.

99986040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3642 (or 3635 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 99986040 is about 9999.3019756381. The cubic root of 99986040 is about 464.1372834961.

The spelling of 99986040 in words is "ninety-nine million, nine hundred eighty-six thousand, forty".