998503632 has 160 divisors (see below), whose sum is σ = 3329826560. Its totient is φ = 280558080.

The previous prime is 998503631. The next prime is 998503633. The reversal of 998503632 is 236305899.

998503632 is a `hidden beast` number, since 9 + 9 + 8 + 5 + 0 + 3 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (998503631) and next prime (998503633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998503631) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 181758 + ... + 187170.

It is an arithmetic number, because the mean of its divisors is an integer number (20811416).

Almost surely, 2^998503632 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 998503632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1664913280).

998503632 is an abundant number, since it is smaller than the sum of its proper divisors (2331322928).

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

998503632 is a wasteful number, since it uses less digits than its factorization.

998503632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498 (or 5486 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 45.

The square root of 998503632 is about 31599.1080886787. The cubic root of 998503632 is about 999.5009616688.

The spelling of 998503632 in words is "nine hundred ninety-eight million, five hundred three thousand, six hundred thirty-two".