99840838 has 8 divisors (see below), whose sum is σ = 156272688. Its totient is φ = 47749944.

The previous prime is 99840821. The next prime is 99840869. The reversal of 99840838 is 83804899.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 99840791 and 99840800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1085181 + ... + 1085272.

It is an arithmetic number, because the mean of its divisors is an integer number (19534086).

Almost surely, 2^99840838 is an apocalyptic number.

99840838 is a deficient number, since it is larger than the sum of its proper divisors (56431850).

99840838 is a wasteful number, since it uses less digits than its factorization.

99840838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170478.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 99840838 is about 9992.0387309097. The cubic root of 99840838 is about 463.9124977436.

The spelling of 99840838 in words is "ninety-nine million, eight hundred forty thousand, eight hundred thirty-eight".