99786240 has 240 divisors, whose sum is σ = 356200416. Its totient is φ = 25804800.

The previous prime is 99786221. The next prime is 99786257. The reversal of 99786240 is 4268799.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (240).

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 23 ways as a sum of consecutive naturals, for example, 1405405 + ... + 1405475.

Almost surely, 2^99786240 is an apocalyptic number.

99786240 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 99786240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178100208).

99786240 is an abundant number, since it is smaller than the sum of its proper divisors (256414176).

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

99786240 is a wasteful number, since it uses less digits than its factorization.

99786240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 99786240 is about 9989.3062822200. The cubic root of 99786240 is about 463.8279187495.

The spelling of 99786240 in words is "ninety-nine million, seven hundred eighty-six thousand, two hundred forty".