2148991392 has 48 divisors (see below), whose sum is σ = 5772301920. Its totient is φ = 699670272.

The previous prime is 2148991367. The next prime is 2148991423. The reversal of 2148991392 is 2931998412.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

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, 256167 + ... + 264422.

It is an arithmetic number, because the mean of its divisors is an integer number (120256290).

Almost surely, 2^2148991392 is an apocalyptic number.

It is an amenable number.

2148991392 is an abundant number, since it is smaller than the sum of its proper divisors (3623310528).

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

2148991392 is a wasteful number, since it uses less digits than its factorization.

2148991392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520645 (or 520637 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 2148991392 is about 46357.2151018587. The cubic root of 2148991392 is about 1290.4610238489.

The spelling of 2148991392 in words is "two billion, one hundred forty-eight million, nine hundred ninety-one thousand, three hundred ninety-two".