28865629 has 8 divisors (see below), whose sum is σ = 31141152. Its totient is φ = 26598000.

The previous prime is 28865623. The next prime is 28865663. The reversal of 28865629 is 92656882.

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

It is not a de Polignac number, because 28865629 - 2⁵ = 28865597 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 (28865623) 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, 7254 + ... + 10504.

It is an arithmetic number, because the mean of its divisors is an integer number (3892644).

Almost surely, 2^28865629 is an apocalyptic number.

It is an amenable number.

28865629 is a deficient number, since it is larger than the sum of its proper divisors (2275523).

28865629 is a wasteful number, since it uses less digits than its factorization.

28865629 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947.

The product of its digits is 414720, while the sum is 46.

The square root of 28865629 is about 5372.6742875406. The cubic root of 28865629 is about 306.7564302185.

It can be divided in two parts, 2886 and 5629, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 28865629 in words is "twenty-eight million, eight hundred sixty-five thousand, six hundred twenty-nine".