2640253930 has 8 divisors (see below), whose sum is σ = 4752457092. Its totient is φ = 1056101568.

The previous prime is 2640253921. The next prime is 2640253937. The reversal of 2640253930 is 393520462.

It can be written as a sum of positive squares in 2 ways, for example, as 2392285921 + 247968009 = 48911^2 + 15747^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2640253937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132012687 + ... + 132012706.

Almost surely, 2^2640253930 is an apocalyptic number.

2640253930 is a deficient number, since it is larger than the sum of its proper divisors (2112203162).

2640253930 is a wasteful number, since it uses less digits than its factorization.

2640253930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264025400.

The product of its (nonzero) digits is 38880, while the sum is 34.

The square root of 2640253930 is about 51383.4013082046. The cubic root of 2640253930 is about 1382.1289567980.

The spelling of 2640253930 in words is "two billion, six hundred forty million, two hundred fifty-three thousand, nine hundred thirty".