28434965 has 16 divisors (see below), whose sum is σ = 38909808. Its totient is φ = 19762176.

The previous prime is 28434947. The next prime is 28434979. The reversal of 28434965 is 56943482.

It can be written as a sum of positive squares in 8 ways, for example, as 3972049 + 24462916 = 1993^2 + 4946^2 .

It is a cyclic number.

It is not a de Polignac number, because 28434965 - 2¹⁴ = 28418581 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11762 + ... + 13971.

It is an arithmetic number, because the mean of its divisors is an integer number (2431863).

Almost surely, 2^28434965 is an apocalyptic number.

It is an amenable number.

28434965 is a deficient number, since it is larger than the sum of its proper divisors (10474843).

28434965 is a wasteful number, since it uses less digits than its factorization.

28434965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25768.

The product of its digits is 207360, while the sum is 41.

The square root of 28434965 is about 5332.4445613621. Note that the first 3 decimals coincide. The cubic root of 28434965 is about 305.2232174078.

The spelling of 28434965 in words is "twenty-eight million, four hundred thirty-four thousand, nine hundred sixty-five".