28989355770 has 24 divisors (see below), whose sum is σ = 75372325236. Its totient is φ = 7730494848.

The previous prime is 28989355763. The next prime is 28989355777. The reversal of 28989355770 is 7755398982.

28989355770 is a `hidden beast` number, since 2 + 8 + 9 + 8 + 9 + 3 + 557 + 70 = 666.

It is an interprime number because it is at equal distance from previous prime (28989355763) and next prime (28989355777).

It can be written as a sum of positive squares in 2 ways, for example, as 27949486761 + 1039869009 = 167181^2 + 32247^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28989355698 and 28989355707.

It is not an unprimeable number, because it can be changed into a prime (28989355777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161051887 + ... + 161052066.

Almost surely, 2^28989355770 is an apocalyptic number.

28989355770 is an abundant number, since it is smaller than the sum of its proper divisors (46382969466).

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

28989355770 is a wasteful number, since it uses less digits than its factorization.

28989355770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322103966 (or 322103963 counting only the distinct ones).

The product of its (nonzero) digits is 38102400, while the sum is 63.

The spelling of 28989355770 in words is "twenty-eight billion, nine hundred eighty-nine million, three hundred fifty-five thousand, seven hundred seventy".