2281438739 has 4 divisors (see below), whose sum is σ = 2304958824. Its totient is φ = 2257918656.

The previous prime is 2281438723. The next prime is 2281438771. The reversal of 2281438739 is 9378341822.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2281438739 - 2⁴ = 2281438723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2281438693 and 2281438702.

It is not an unprimeable number, because it can be changed into a prime (2281438799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11759897 + ... + 11760090.

It is an arithmetic number, because the mean of its divisors is an integer number (576239706).

Almost surely, 2^2281438739 is an apocalyptic number.

2281438739 is a deficient number, since it is larger than the sum of its proper divisors (23520085).

2281438739 is an equidigital number, since it uses as much as digits as its factorization.

2281438739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23520084.

The product of its digits is 580608, while the sum is 47.

The square root of 2281438739 is about 47764.4087056461. The cubic root of 2281438739 is about 1316.4456603757.

The spelling of 2281438739 in words is "two billion, two hundred eighty-one million, four hundred thirty-eight thousand, seven hundred thirty-nine".