28078576770 has 64 divisors (see below), whose sum is σ = 70964398080. Its totient is φ = 7090630848.

The previous prime is 28078576763. The next prime is 28078576777. The reversal of 28078576770 is 7767587082.

It is an interprime number because it is at equal distance from previous prime (28078576763) and next prime (28078576777).

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a self number, because there is not a number n which added to its sum of digits gives 28078576770.

It is not an unprimeable number, because it can be changed into a prime (28078576777) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1611847 + ... + 1629173.

It is an arithmetic number, because the mean of its divisors is an integer number (1108818720).

Almost surely, 2^28078576770 is an apocalyptic number.

28078576770 is an abundant number, since it is smaller than the sum of its proper divisors (42885821310).

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

28078576770 is a wasteful number, since it uses less digits than its factorization.

28078576770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20199.

The product of its (nonzero) digits is 9219840, while the sum is 57.

The spelling of 28078576770 in words is "twenty-eight billion, seventy-eight million, five hundred seventy-six thousand, seven hundred seventy".