28655039 has 8 divisors (see below), whose sum is σ = 32891040. Its totient is φ = 24454656.

The previous prime is 28655009. The next prime is 28655041. The reversal of 28655039 is 93055682.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28655039 is a prime.

It is a super-2 number, since 2×28655039² = 1642222520183042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28654993 and 28655011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28655009) 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, 7154 + ... + 10415.

It is an arithmetic number, because the mean of its divisors is an integer number (4111380).

Almost surely, 2^28655039 is an apocalyptic number.

28655039 is a deficient number, since it is larger than the sum of its proper divisors (4236001).

28655039 is a wasteful number, since it uses less digits than its factorization.

28655039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17809.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 28655039 is about 5353.0401642431. The cubic root of 28655039 is about 306.0086253567.

The spelling of 28655039 in words is "twenty-eight million, six hundred fifty-five thousand, thirty-nine".