28555967 has 8 divisors (see below), whose sum is σ = 31912272. Its totient is φ = 25326400.

The previous prime is 28555963. The next prime is 28555973. The reversal of 28555967 is 76955582.

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

It is not a de Polignac number, because 28555967 - 2² = 28555963 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 (28555963) 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, 31208 + ... + 32109.

It is an arithmetic number, because the mean of its divisors is an integer number (3989034).

Almost surely, 2^28555967 is an apocalyptic number.

28555967 is a deficient number, since it is larger than the sum of its proper divisors (3356305).

28555967 is a wasteful number, since it uses less digits than its factorization.

28555967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63369.

The product of its digits is 756000, while the sum is 47.

The square root of 28555967 is about 5343.7783449541. The cubic root of 28555967 is about 305.6555531562.

The spelling of 28555967 in words is "twenty-eight million, five hundred fifty-five thousand, nine hundred sixty-seven".