2640428042 has 16 divisors (see below), whose sum is σ = 4540734720. Its totient is φ = 1128040368.

The previous prime is 2640428039. The next prime is 2640428107. The reversal of 2640428042 is 2408240462.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 293042 + ... + 301917.

It is an arithmetic number, because the mean of its divisors is an integer number (283795920).

Almost surely, 2^2640428042 is an apocalyptic number.

2640428042 is a deficient number, since it is larger than the sum of its proper divisors (1900306678).

2640428042 is a wasteful number, since it uses less digits than its factorization.

2640428042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595285.

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 2640428042 is about 51385.0955238968. The cubic root of 2640428042 is about 1382.1593377075.

The spelling of 2640428042 in words is "two billion, six hundred forty million, four hundred twenty-eight thousand, forty-two".