3728009642 has 16 divisors (see below), whose sum is σ = 6406509120. Its totient is φ = 1593809568.

The previous prime is 3728009599. The next prime is 3728009647. The reversal of 3728009642 is 2469008273.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 3728009642.

It is not an unprimeable number, because it can be changed into a prime (3728009647) 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, 319808 + ... + 331259.

It is an arithmetic number, because the mean of its divisors is an integer number (400406820).

Almost surely, 2^3728009642 is an apocalyptic number.

3728009642 is a deficient number, since it is larger than the sum of its proper divisors (2678499478).

3728009642 is a wasteful number, since it uses less digits than its factorization.

3728009642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651485.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 3728009642 is about 61057.4290483967. The cubic root of 3728009642 is about 1550.5734460914.

The spelling of 3728009642 in words is "three billion, seven hundred twenty-eight million, nine thousand, six hundred forty-two".