28008057506 has 32 divisors (see below), whose sum is σ = 50949029376. Its totient is φ = 11372544000.

The previous prime is 28008057487. The next prime is 28008057527. The reversal of 28008057506 is 60575080082.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1570655 + ... + 1588386.

It is an arithmetic number, because the mean of its divisors is an integer number (1592157168).

Almost surely, 2^28008057506 is an apocalyptic number.

28008057506 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28008057506 is a deficient number, since it is larger than the sum of its proper divisors (22940971870).

28008057506 is a wasteful number, since it uses less digits than its factorization.

28008057506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3159098.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 28008057506 in words is "twenty-eight billion, eight million, fifty-seven thousand, five hundred six".