28709629 has 8 divisors (see below), whose sum is σ = 31004960. Its totient is φ = 26426736.

The previous prime is 28709591. The next prime is 28709633. The reversal of 28709629 is 92690782.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28709629 - 2¹⁵ = 28676861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28709699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2014 + ... + 7840.

It is an arithmetic number, because the mean of its divisors is an integer number (3875620).

Almost surely, 2^28709629 is an apocalyptic number.

It is an amenable number.

28709629 is a deficient number, since it is larger than the sum of its proper divisors (2295331).

28709629 is a wasteful number, since it uses less digits than its factorization.

28709629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6219.

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 28709629 is about 5358.1367097154. The cubic root of 28709629 is about 306.2028252200.

The spelling of 28709629 in words is "twenty-eight million, seven hundred nine thousand, six hundred twenty-nine".