2291908738 has 16 divisors (see below), whose sum is σ = 4099812480. Its totient is φ = 939540096.

The previous prime is 2291908721. The next prime is 2291908739. The reversal of 2291908738 is 8378091922.

It is a junction number, because it is equal to n+sod(n) for n = 2291908691 and 2291908700.

It is not an unprimeable number, because it can be changed into a prime (2291908739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3558543 + ... + 3559186.

It is an arithmetic number, because the mean of its divisors is an integer number (256238280).

Almost surely, 2^2291908738 is an apocalyptic number.

2291908738 is a deficient number, since it is larger than the sum of its proper divisors (1807903742).

2291908738 is a wasteful number, since it uses less digits than its factorization.

2291908738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7117761.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 2291908738 is about 47873.8836736691. The cubic root of 2291908738 is about 1318.4564023206.

The spelling of 2291908738 in words is "two billion, two hundred ninety-one million, nine hundred eight thousand, seven hundred thirty-eight".