998992511 has 32 divisors (see below), whose sum is σ = 1173312000. Its totient is φ = 841420800.

The previous prime is 998992481. The next prime is 998992513. The reversal of 998992511 is 115299899.

It is not a de Polignac number, because 998992511 - 2⁶ = 998992447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (998992513) 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, 2001740 + ... + 2002238.

It is an arithmetic number, because the mean of its divisors is an integer number (36666000).

Almost surely, 2^998992511 is an apocalyptic number.

998992511 is a deficient number, since it is larger than the sum of its proper divisors (174319489).

998992511 is a wasteful number, since it uses less digits than its factorization.

998992511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767.

The product of its digits is 524880, while the sum is 53.

The square root of 998992511 is about 31606.8427875990. The cubic root of 998992511 is about 999.6640574886.

The spelling of 998992511 in words is "nine hundred ninety-eight million, nine hundred ninety-two thousand, five hundred eleven".