993399128 has 16 divisors (see below), whose sum is σ = 1880032680. Its totient is φ = 492057088.

The previous prime is 993399119. The next prime is 993399137. The reversal of 993399128 is 821993399.

It is an interprime number because it is at equal distance from previous prime (993399119) and next prime (993399137).

It is a super-2 number, since 2×993399128² = 1973683655022320768, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 993399128.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 579401 + ... + 581112.

Almost surely, 2^993399128 is an apocalyptic number.

It is an amenable number.

993399128 is a deficient number, since it is larger than the sum of its proper divisors (886633552).

993399128 is a wasteful number, since it uses less digits than its factorization.

993399128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160626 (or 1160622 counting only the distinct ones).

The product of its digits is 944784, while the sum is 53.

The square root of 993399128 is about 31518.2348490521. The cubic root of 993399128 is about 997.7948502221.

The spelling of 993399128 in words is "nine hundred ninety-three million, three hundred ninety-nine thousand, one hundred twenty-eight".