99593640 has 96 divisors (see below), whose sum is σ = 332471880. Its totient is φ = 25837056.

The previous prime is 99593579. The next prime is 99593651. The reversal of 99593640 is 4639599.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 99321156 + 272484 = 9966^2 + 522^2 .

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9582 + ... + 17058.

Almost surely, 2^99593640 is an apocalyptic number.

99593640 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 99593640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166235940).

99593640 is an abundant number, since it is smaller than the sum of its proper divisors (232878240).

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

99593640 is a wasteful number, since it uses less digits than its factorization.

99593640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7531 (or 7524 counting only the distinct ones).

The product of its (nonzero) digits is 262440, while the sum is 45.

The square root of 99593640 is about 9979.6613168985. The cubic root of 99593640 is about 463.5293111336.

The spelling of 99593640 in words is "ninety-nine million, five hundred ninety-three thousand, six hundred forty".