28778707002 has 64 divisors (see below), whose sum is σ = 58957797888. Its totient is φ = 9362304000.

The previous prime is 28778706977. The next prime is 28778707007. The reversal of 28778707002 is 20070787782.

It is not an unprimeable number, because it can be changed into a prime (28778707007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38016408 + ... + 38017164.

It is an arithmetic number, because the mean of its divisors is an integer number (921215592).

Almost surely, 2^28778707002 is an apocalyptic number.

28778707002 is an abundant number, since it is smaller than the sum of its proper divisors (30179090886).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28778707002 is a wasteful number, since it uses less digits than its factorization.

28778707002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1495.

The product of its (nonzero) digits is 614656, while the sum is 48.

The spelling of 28778707002 in words is "twenty-eight billion, seven hundred seventy-eight million, seven hundred seven thousand, two".