2640202442 has 8 divisors (see below), whose sum is σ = 4193262756. Its totient is φ = 1242448192.

The previous prime is 2640202429. The next prime is 2640202463. The reversal of 2640202442 is 2442020462.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2550351001 + 89851441 = 50501^2 + 9479^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38826473 + ... + 38826540.

Almost surely, 2^2640202442 is an apocalyptic number.

2640202442 is a deficient number, since it is larger than the sum of its proper divisors (1553060314).

2640202442 is a wasteful number, since it uses less digits than its factorization.

2640202442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77653032.

The product of its (nonzero) digits is 6144, while the sum is 26.

The square root of 2640202442 is about 51382.9002879363. The cubic root of 2640202442 is about 1382.1199723695.

The spelling of 2640202442 in words is "two billion, six hundred forty million, two hundred two thousand, four hundred forty-two".