28060638739 has 8 divisors (see below), whose sum is σ = 32171761760. Its totient is φ = 23975130816.

The previous prime is 28060638721. The next prime is 28060638751. The reversal of 28060638739 is 93783606082.

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

It is not a de Polignac number, because 28060638739 - 2²³ = 28052250131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28060638239) 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, 6401424 + ... + 6405805.

It is an arithmetic number, because the mean of its divisors is an integer number (4021470220).

Almost surely, 2^28060638739 is an apocalyptic number.

28060638739 is a deficient number, since it is larger than the sum of its proper divisors (4111123021).

28060638739 is a wasteful number, since it uses less digits than its factorization.

28060638739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12807549.

The product of its (nonzero) digits is 2612736, while the sum is 52.

The spelling of 28060638739 in words is "twenty-eight billion, sixty million, six hundred thirty-eight thousand, seven hundred thirty-nine".