99840454 has 8 divisors (see below), whose sum is σ = 171155088. Its totient is φ = 42788760.

The previous prime is 99840443. The next prime is 99840457. The reversal of 99840454 is 45404899.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×99840454² = 19936232509852232, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 99840454.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99840457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3565717 + ... + 3565744.

It is an arithmetic number, because the mean of its divisors is an integer number (21394386).

Almost surely, 2^99840454 is an apocalyptic number.

99840454 is a deficient number, since it is larger than the sum of its proper divisors (71314634).

99840454 is a wasteful number, since it uses less digits than its factorization.

99840454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131470.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 99840454 is about 9992.0195155934. The cubic root of 99840454 is about 463.9119029882.

The spelling of 99840454 in words is "ninety-nine million, eight hundred forty thousand, four hundred fifty-four".