2148640992 has 144 divisors (see below), whose sum is σ = 6670460160. Its totient is φ = 678471552.

The previous prime is 2148640981. The next prime is 2148641017. The reversal of 2148640992 is 2990468412.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×2148640992² = 9233316225005488128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140473 + ... + 155015.

It is an arithmetic number, because the mean of its divisors is an integer number (46322640).

Almost surely, 2^2148640992 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 2148640992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3335230080).

2148640992 is an abundant number, since it is smaller than the sum of its proper divisors (4521819168).

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

2148640992 is a wasteful number, since it uses less digits than its factorization.

2148640992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14587 (or 14567 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 2148640992 is about 46353.4356008268. The cubic root of 2148640992 is about 1290.3908820879.

The spelling of 2148640992 in words is "two billion, one hundred forty-eight million, six hundred forty thousand, nine hundred ninety-two".