998958440 has 64 divisors (see below), whose sum is σ = 2423736000. Its totient is φ = 369308160.

The previous prime is 998958347. The next prime is 998958451. The reversal of 998958440 is 44859899.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15131 + ... + 47189.

It is an arithmetic number, because the mean of its divisors is an integer number (37870875).

Almost surely, 2^998958440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 998958440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211868000).

998958440 is an abundant number, since it is smaller than the sum of its proper divisors (1424777560).

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

998958440 is a wasteful number, since it uses less digits than its factorization.

998958440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32130 (or 32126 counting only the distinct ones).

The product of its (nonzero) digits is 3732480, while the sum is 56.

The square root of 998958440 is about 31606.3038016153. The cubic root of 998958440 is about 999.6526927250.

The spelling of 998958440 in words is "nine hundred ninety-eight million, nine hundred fifty-eight thousand, four hundred forty".