998885745 has 192 divisors, whose sum is σ = 2253049344. Its totient is φ = 401448960.

The previous prime is 998885737. The next prime is 998885749. The reversal of 998885745 is 547588899.

It is a happy number.

It is not a de Polignac number, because 998885745 - 2³ = 998885737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (998885749) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 2515887 + ... + 2516283.

It is an arithmetic number, because the mean of its divisors is an integer number (11734632).

Almost surely, 2^998885745 is an apocalyptic number.

It is an amenable number.

998885745 is an abundant number, since it is smaller than the sum of its proper divisors (1254163599).

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

998885745 is a wasteful number, since it uses less digits than its factorization.

998885745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472 (or 469 counting only the distinct ones).

The product of its digits is 29030400, while the sum is 63.

The square root of 998885745 is about 31605.1537727631. The cubic root of 998885745 is about 999.6284436296.

The spelling of 998885745 in words is "nine hundred ninety-eight million, eight hundred eighty-five thousand, seven hundred forty-five".