28956945 has 16 divisors (see below), whose sum is σ = 47826432. Its totient is φ = 14945280.

The previous prime is 28956919. The next prime is 28956953. The reversal of 28956945 is 54965982.

It is not a de Polignac number, because 28956945 - 2¹⁰ = 28955921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28956894 and 28956903.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30672 + ... + 31601.

It is an arithmetic number, because the mean of its divisors is an integer number (2989152).

Almost surely, 2^28956945 is an apocalyptic number.

It is an amenable number.

28956945 is a deficient number, since it is larger than the sum of its proper divisors (18869487).

28956945 is a wasteful number, since it uses less digits than its factorization.

28956945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62312.

The product of its digits is 777600, while the sum is 48.

The square root of 28956945 is about 5381.1657658913. The cubic root of 28956945 is about 307.0795628931.

The spelling of 28956945 in words is "twenty-eight million, nine hundred fifty-six thousand, nine hundred forty-five".