28457655 has 8 divisors (see below), whose sum is σ = 45532272. Its totient is φ = 15177408.

The previous prime is 28457641. The next prime is 28457669. The reversal of 28457655 is 55675482.

It is an interprime number because it is at equal distance from previous prime (28457641) and next prime (28457669).

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

It is not a de Polignac number, because 28457655 - 2²⁰ = 27409079 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 948574 + ... + 948603.

It is an arithmetic number, because the mean of its divisors is an integer number (5691534).

Almost surely, 2^28457655 is an apocalyptic number.

28457655 is a deficient number, since it is larger than the sum of its proper divisors (17074617).

28457655 is a wasteful number, since it uses less digits than its factorization.

28457655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897185.

The product of its digits is 336000, while the sum is 42.

The square root of 28457655 is about 5334.5716791510. The cubic root of 28457655 is about 305.3043812557.

The spelling of 28457655 in words is "twenty-eight million, four hundred fifty-seven thousand, six hundred fifty-five".