999923148 has 72 divisors (see below), whose sum is σ = 2893826208. Its totient is φ = 285182208.

The previous prime is 999923143. The next prime is 999923173. The reversal of 999923148 is 841329999.

It is a junction number, because it is equal to n+sod(n) for n = 999923094 and 999923103.

It is not an unprimeable number, because it can be changed into a prime (999923143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151240 + ... + 157712.

Almost surely, 2^999923148 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 999923148, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1446913104).

999923148 is an abundant number, since it is smaller than the sum of its proper divisors (1893903060).

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

999923148 is a wasteful number, since it uses less digits than its factorization.

999923148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7103 (or 7098 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 999923148 is about 31621.5614415228. The cubic root of 999923148 is about 999.9743820104.

The spelling of 999923148 in words is "nine hundred ninety-nine million, nine hundred twenty-three thousand, one hundred forty-eight".