28945577956 has 27 divisors (see below), whose sum is σ = 51006726057. Its totient is φ = 14372920320.

The previous prime is 28945577953. The next prime is 28945578017. The reversal of 28945577956 is 65977554982.

The square root of 28945577956 is 170134.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 28496816100 + 448761856 = 168810^2 + 21184^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28945577891 and 28945577900.

It is not an unprimeable number, because it can be changed into a prime (28945577953) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 87448711 + ... + 87449041.

Almost surely, 2^28945577956 is an apocalyptic number.

28945577956 is the 170134-th square number.

It is an amenable number.

28945577956 is a deficient number, since it is larger than the sum of its proper divisors (22061148101).

28945577956 is an frugal number, since it uses more digits than its factorization.

28945577956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1180 (or 590 counting only the distinct ones).

The product of its digits is 190512000, while the sum is 67.

The spelling of 28945577956 in words is "twenty-eight billion, nine hundred forty-five million, five hundred seventy-seven thousand, nine hundred fifty-six".