999988948 has 48 divisors (see below), whose sum is σ = 2103542784. Its totient is φ = 406897920.

The previous prime is 999988919. The next prime is 999988949. The reversal of 999988948 is 849889999.

It is a super-2 number, since 2×999988948² = 1999955792244293408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999988949) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35136 + ... + 56872.

It is an arithmetic number, because the mean of its divisors is an integer number (43823808).

Almost surely, 2^999988948 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 999988948, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1051771392).

999988948 is an abundant number, since it is smaller than the sum of its proper divisors (1103553836).

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

999988948 is a wasteful number, since it uses less digits than its factorization.

999988948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21832 (or 21830 counting only the distinct ones).

The product of its digits is 120932352, while the sum is 73.

The square root of 999988948 is about 31622.6018537375. The cubic root of 999988948 is about 999.9963159864.

The spelling of 999988948 in words is "nine hundred ninety-nine million, nine hundred eighty-eight thousand, nine hundred forty-eight".