199998924408 has 96 divisors (see below), whose sum is σ = 553405469760. Its totient is φ = 65222288640.

The previous prime is 199998924371. The next prime is 199998924443. The reversal of 199998924408 is 804429899991.

199998924408 is a `hidden beast` number, since 1 + 9 + 9 + 9 + 98 + 92 + 440 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9860998 + ... + 9881258.

It is an arithmetic number, because the mean of its divisors is an integer number (5764640310).

Almost surely, 2^199998924408 is an apocalyptic number.

199998924408 is a gapful number since it is divisible by the number (18) 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 199998924408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276702734880).

199998924408 is an abundant number, since it is smaller than the sum of its proper divisors (353406545352).

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

199998924408 is a wasteful number, since it uses less digits than its factorization.

199998924408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23237 (or 23230 counting only the distinct ones).

The product of its (nonzero) digits is 120932352, while the sum is 72.

The spelling of 199998924408 in words is "one hundred ninety-nine billion, nine hundred ninety-eight million, nine hundred twenty-four thousand, four hundred eight".