28866629 has 16 divisors (see below), whose sum is σ = 34499520. Its totient is φ = 23842560.

The previous prime is 28866599. The next prime is 28866637. The reversal of 28866629 is 92666882.

It is a cyclic number.

It is not a de Polignac number, because 28866629 - 2²⁰ = 27818053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28866689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2762 + ... + 8084.

It is an arithmetic number, because the mean of its divisors is an integer number (2156220).

Almost surely, 2^28866629 is an apocalyptic number.

28866629 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28866629 is a deficient number, since it is larger than the sum of its proper divisors (5632891).

28866629 is a wasteful number, since it uses less digits than its factorization.

28866629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380.

The product of its digits is 497664, while the sum is 47.

The square root of 28866629 is about 5372.7673502582. The cubic root of 28866629 is about 306.7599725270.

The spelling of 28866629 in words is "twenty-eight million, eight hundred sixty-six thousand, six hundred twenty-nine".