28306629 has 48 divisors (see below), whose sum is σ = 46929792. Its totient is φ = 16308864.

The previous prime is 28306609. The next prime is 28306633. The reversal of 28306629 is 92660382.

28306629 is a `hidden beast` number, since 28 + 3 + 0 + 6 + 629 = 666.

It is not a de Polignac number, because 28306629 - 2¹³ = 28298437 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28306593 and 28306602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28306609) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 180219 + ... + 180375.

It is an arithmetic number, because the mean of its divisors is an integer number (977704).

Almost surely, 2^28306629 is an apocalyptic number.

It is an amenable number.

28306629 is a deficient number, since it is larger than the sum of its proper divisors (18623163).

28306629 is a wasteful number, since it uses less digits than its factorization.

28306629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 28306629 is about 5320.3974475597. The cubic root of 28306629 is about 304.7633351747.

The spelling of 28306629 in words is "twenty-eight million, three hundred six thousand, six hundred twenty-nine".