99751440 has 40 divisors (see below), whose sum is σ = 309230208. Its totient is φ = 26600320.

The previous prime is 99751423. The next prime is 99751441. The reversal of 99751440 is 4415799.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (99751441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207576 + ... + 208055.

Almost surely, 2^99751440 is an apocalyptic number.

It is an amenable number.

99751440 is an abundant number, since it is smaller than the sum of its proper divisors (209478768).

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

99751440 is a wasteful number, since it uses less digits than its factorization.

99751440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415647 (or 415641 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 99751440 is about 9987.5642676280. The cubic root of 99751440 is about 463.7739931837.

The spelling of 99751440 in words is "ninety-nine million, seven hundred fifty-one thousand, four hundred forty".