998743940424 has 48 divisors (see below), whose sum is σ = 2805114159120. Its totient is φ = 332914646160.

The previous prime is 998743940387. The next prime is 998743940443. The reversal of 998743940424 is 424049347899.

998743940424 is a `hidden beast` number, since 9 + 9 + 87 + 43 + 94 + 0 + 424 = 666.

It is a super-2 number, since 2×998743940424² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 256876642 + ... + 256880529.

It is an arithmetic number, because the mean of its divisors is an integer number (58439878315).

Almost surely, 2^998743940424 is an apocalyptic number.

It is an amenable number.

998743940424 is an abundant number, since it is smaller than the sum of its proper divisors (1806370218696).

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

998743940424 is a wasteful number, since it uses less digits than its factorization.

998743940424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 513757192 (or 513757176 counting only the distinct ones).

The product of its (nonzero) digits is 62705664, while the sum is 63.

The spelling of 998743940424 in words is "nine hundred ninety-eight billion, seven hundred forty-three million, nine hundred forty thousand, four hundred twenty-four".