28815629 has 8 divisors (see below), whose sum is σ = 30700800. Its totient is φ = 26951616.

The previous prime is 28815613. The next prime is 28815643. The reversal of 28815629 is 92651882.

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 28815629 - 2⁴ = 28815613 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 (28815029) 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, 2429 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (3837600).

Almost surely, 2^28815629 is an apocalyptic number.

It is an amenable number.

28815629 is a deficient number, since it is larger than the sum of its proper divisors (1885171).

28815629 is a wasteful number, since it uses less digits than its factorization.

28815629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10579.

The product of its digits is 69120, while the sum is 41.

The square root of 28815629 is about 5368.0190946009. The cubic root of 28815629 is about 306.5792103847.

The spelling of 28815629 in words is "twenty-eight million, eight hundred fifteen thousand, six hundred twenty-nine".