28509755370970 has 16 divisors (see below), whose sum is σ = 51336433405440. Its totient is φ = 11399707984464.

The previous prime is 28509755370931. The next prime is 28509755370973. The reversal of 28509755370970 is 7907355790582.

It is a junction number, because it is equal to n+sod(n) for n = 28509755370896 and 28509755370905.

It is not an unprimeable number, because it can be changed into a prime (28509755370973) 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, 524241942 + ... + 524296321.

It is an arithmetic number, because the mean of its divisors is an integer number (3208527087840).

Almost surely, 2^{28509755370970} is an apocalyptic number.

28509755370970 is a deficient number, since it is larger than the sum of its proper divisors (22826678034470).

28509755370970 is a wasteful number, since it uses less digits than its factorization.

28509755370970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048540989.

The product of its (nonzero) digits is 166698000, while the sum is 67.

The spelling of 28509755370970 in words is "twenty-eight trillion, five hundred nine billion, seven hundred fifty-five million, three hundred seventy thousand, nine hundred seventy".