999489538 has 16 divisors (see below), whose sum is σ = 1548368640. Its totient is φ = 483382800.

The previous prime is 999489527. The next prime is 999489571. The reversal of 999489538 is 835984999.

It is a self number, because there is not a number n which added to its sum of digits gives 999489538.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234793 + ... + 239011.

It is an arithmetic number, because the mean of its divisors is an integer number (96773040).

Almost surely, 2^999489538 is an apocalyptic number.

999489538 is a deficient number, since it is larger than the sum of its proper divisors (548879102).

999489538 is a wasteful number, since it uses less digits than its factorization.

999489538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8073.

The product of its digits is 25194240, while the sum is 64.

The square root of 999489538 is about 31614.7044585269. The cubic root of 999489538 is about 999.8298170394.

The spelling of 999489538 in words is "nine hundred ninety-nine million, four hundred eighty-nine thousand, five hundred thirty-eight".