2291239730 has 32 divisors (see below), whose sum is σ = 4443692400. Its totient is φ = 845574912.

The previous prime is 2291239711. The next prime is 2291239739. The reversal of 2291239730 is 379321922.

It can be written as a sum of positive squares in 8 ways, for example, as 97160449 + 2194079281 = 9857^2 + 46841^2 .

It is not an unprimeable number, because it can be changed into a prime (2291239739) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401336 + ... + 407004.

Almost surely, 2^2291239730 is an apocalyptic number.

2291239730 is a deficient number, since it is larger than the sum of its proper divisors (2152452670).

2291239730 is a wasteful number, since it uses less digits than its factorization.

2291239730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8798.

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 2291239730 is about 47866.8959720599. The cubic root of 2291239730 is about 1318.3281040593.

The spelling of 2291239730 in words is "two billion, two hundred ninety-one million, two hundred thirty-nine thousand, seven hundred thirty".