28771455 has 8 divisors (see below), whose sum is σ = 46034352. Its totient is φ = 15344768.

The previous prime is 28771447. The next prime is 28771481. The reversal of 28771455 is 55417782.

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 28771455 - 2³ = 28771447 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, 959034 + ... + 959063.

It is an arithmetic number, because the mean of its divisors is an integer number (5754294).

Almost surely, 2^28771455 is an apocalyptic number.

28771455 is a deficient number, since it is larger than the sum of its proper divisors (17262897).

28771455 is a wasteful number, since it uses less digits than its factorization.

28771455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1918105.

The product of its digits is 78400, while the sum is 39.

The square root of 28771455 is about 5363.9029633281. The cubic root of 28771455 is about 306.4224695611.

The spelling of 28771455 in words is "twenty-eight million, seven hundred seventy-one thousand, four hundred fifty-five".