2158030340 has 24 divisors (see below), whose sum is σ = 4532756760. Its totient is φ = 863042048.

The previous prime is 2158030313. The next prime is 2158030349. The reversal of 2158030340 is 430308512.

It can be written as a sum of positive squares in 4 ways, for example, as 476374276 + 1681656064 = 21826^2 + 41008^2 .

It is not an unprimeable number, because it can be changed into a prime (2158030349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160934 + ... + 173826.

It is an arithmetic number, because the mean of its divisors is an integer number (188864865).

Almost surely, 2^2158030340 is an apocalyptic number.

2158030340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2158030340 is an abundant number, since it is smaller than the sum of its proper divisors (2374726420).

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

2158030340 is a wasteful number, since it uses less digits than its factorization.

2158030340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21271 (or 21269 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 2158030340 is about 46454.6051538488. The cubic root of 2158030340 is about 1292.2677775061.

Adding to 2158030340 its reverse (430308512), we get a palindrome (2588338852).

The spelling of 2158030340 in words is "two billion, one hundred fifty-eight million, thirty thousand, three hundred forty".