28273965 has 16 divisors (see below), whose sum is σ = 45748800. Its totient is φ = 14909312.

The previous prime is 28273951. The next prime is 28273967. The reversal of 28273965 is 56937282.

It is a cyclic number.

It is not a de Polignac number, because 28273965 - 2⁶ = 28273901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28273967) 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, 9255 + ... + 11924.

It is an arithmetic number, because the mean of its divisors is an integer number (2859300).

Almost surely, 2^28273965 is an apocalyptic number.

It is an amenable number.

28273965 is a deficient number, since it is larger than the sum of its proper divisors (17474835).

28273965 is a wasteful number, since it uses less digits than its factorization.

28273965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21276.

The product of its digits is 181440, while the sum is 42.

The square root of 28273965 is about 5317.3268660108. The cubic root of 28273965 is about 304.6460643981.

It can be divided in two parts, 282 and 73965, that added together give a palindrome (74247).

The spelling of 28273965 in words is "twenty-eight million, two hundred seventy-three thousand, nine hundred sixty-five".