28267965 has 24 divisors (see below), whose sum is σ = 53453088. Its totient is φ = 13705440.

The previous prime is 28267961. The next prime is 28267979. The reversal of 28267965 is 56976282.

It is not a de Polignac number, because 28267965 - 2² = 28267961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28267965.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28267961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28059 + ... + 29048.

It is an arithmetic number, because the mean of its divisors is an integer number (2227212).

Almost surely, 2^28267965 is an apocalyptic number.

It is an amenable number.

28267965 is a deficient number, since it is larger than the sum of its proper divisors (25185123).

28267965 is a wasteful number, since it uses less digits than its factorization.

28267965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57129 (or 57126 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28267965 is about 5316.7626428119. The cubic root of 28267965 is about 304.6245132916.

The spelling of 28267965 in words is "twenty-eight million, two hundred sixty-seven thousand, nine hundred sixty-five".