28642629 has 4 divisors (see below), whose sum is σ = 38190176. Its totient is φ = 19095084.

The previous prime is 28642619. The next prime is 28642643. The reversal of 28642629 is 92624682.

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 not a de Polignac number, because 28642629 - 2⁵ = 28642597 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 (28642619) 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, 4773769 + ... + 4773774.

It is an arithmetic number, because the mean of its divisors is an integer number (9547544).

Almost surely, 2^28642629 is an apocalyptic number.

It is an amenable number.

28642629 is a deficient number, since it is larger than the sum of its proper divisors (9547547).

28642629 is an equidigital number, since it uses as much as digits as its factorization.

28642629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9547546.

The product of its digits is 82944, while the sum is 39.

The square root of 28642629 is about 5351.8808843247. The cubic root of 28642629 is about 305.9644433033.

The spelling of 28642629 in words is "twenty-eight million, six hundred forty-two thousand, six hundred twenty-nine".