28225679945 has 16 divisors (see below), whose sum is σ = 34608219840. Its totient is φ = 22092571200.

The previous prime is 28225679941. The next prime is 28225679959. The reversal of 28225679945 is 54997652282.

It is not a de Polignac number, because 28225679945 - 2² = 28225679941 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is not an unprimeable number, because it can be changed into a prime (28225679941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 164486 + ... + 288975.

It is an arithmetic number, because the mean of its divisors is an integer number (2163013740).

Almost surely, 2^28225679945 is an apocalyptic number.

It is an amenable number.

28225679945 is a deficient number, since it is larger than the sum of its proper divisors (6382539895).

28225679945 is a wasteful number, since it uses less digits than its factorization.

28225679945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453736.

The product of its digits is 21772800, while the sum is 59.

The spelling of 28225679945 in words is "twenty-eight billion, two hundred twenty-five million, six hundred seventy-nine thousand, nine hundred forty-five".