28065629 has 4 divisors (see below), whose sum is σ = 28267680. Its totient is φ = 27863580.

The previous prime is 28065613. The next prime is 28065637. The reversal of 28065629 is 92656082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28065629 - 2⁴ = 28065613 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28065592 and 28065601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28065659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100817 + ... + 101094.

It is an arithmetic number, because the mean of its divisors is an integer number (7066920).

Almost surely, 2^28065629 is an apocalyptic number.

It is an amenable number.

28065629 is a deficient number, since it is larger than the sum of its proper divisors (202051).

28065629 is a wasteful number, since it uses less digits than its factorization.

28065629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202050.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 28065629 is about 5297.7003501519. The cubic root of 28065629 is about 303.8959600407.

The spelling of 28065629 in words is "twenty-eight million, sixty-five thousand, six hundred twenty-nine".