99940000 has 120 divisors (see below), whose sum is σ = 259791840. Its totient is φ = 37728000.

The previous prime is 99939967. The next prime is 99940007. The reversal of 99940000 is 4999.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (99940007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 379869 + ... + 380131.

It is an arithmetic number, because the mean of its divisors is an integer number (2164932).

Almost surely, 2^99940000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99940000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129895920).

99940000 is an abundant number, since it is smaller than the sum of its proper divisors (159851840).

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

99940000 is a wasteful number, since it uses less digits than its factorization.

99940000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 99940000 is about 9996.9995498649. Note that the first 3 decimals coincide. The cubic root of 99940000 is about 464.0660330121.

Adding to 99940000 its reverse (4999), we get a palindrome (99944999).

The spelling of 99940000 in words is "ninety-nine million, nine hundred forty thousand".