28340728007 has 8 divisors (see below), whose sum is σ = 29325504000. Its totient is φ = 27356452704.

The previous prime is 28340727979. The next prime is 28340728021. The reversal of 28340728007 is 70082704382.

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

It is a cyclic number.

It is not a de Polignac number, because 28340728007 - 2²² = 28336533703 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28340728037) 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, 8132 + ... + 238217.

It is an arithmetic number, because the mean of its divisors is an integer number (3665688000).

Almost surely, 2^28340728007 is an apocalyptic number.

28340728007 is a deficient number, since it is larger than the sum of its proper divisors (984775993).

28340728007 is a wasteful number, since it uses less digits than its factorization.

28340728007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250345.

The product of its (nonzero) digits is 150528, while the sum is 41.

The spelling of 28340728007 in words is "twenty-eight billion, three hundred forty million, seven hundred twenty-eight thousand, seven".