2139449748 has 24 divisors (see below), whose sum is σ = 5153084160. Its totient is φ = 690144960.

The previous prime is 2139449743. The next prime is 2139449783. The reversal of 2139449748 is 8479449312.

It is a self number, because there is not a number n which added to its sum of digits gives 2139449748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139449743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2875233 + ... + 2875976.

It is an arithmetic number, because the mean of its divisors is an integer number (214711840).

Almost surely, 2^2139449748 is an apocalyptic number.

It is an amenable number.

2139449748 is an abundant number, since it is smaller than the sum of its proper divisors (3013634412).

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

2139449748 is a wasteful number, since it uses less digits than its factorization.

2139449748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5751247 (or 5751245 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 51.

The square root of 2139449748 is about 46254.1862754065. The cubic root of 2139449748 is about 1288.5482833779.

The spelling of 2139449748 in words is "two billion, one hundred thirty-nine million, four hundred forty-nine thousand, seven hundred forty-eight".