28771457 has 16 divisors (see below), whose sum is σ = 34026048. Its totient is φ = 23983680.

The previous prime is 28771447. The next prime is 28771481. The reversal of 28771457 is 75417782.

It is a cyclic number.

It is not a de Polignac number, because 28771457 - 2⁸ = 28771201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28771447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24158 + ... + 25320.

It is an arithmetic number, because the mean of its divisors is an integer number (2126628).

Almost surely, 2^28771457 is an apocalyptic number.

It is an amenable number.

28771457 is a deficient number, since it is larger than the sum of its proper divisors (5254591).

28771457 is a wasteful number, since it uses less digits than its factorization.

28771457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1360.

The product of its digits is 109760, while the sum is 41.

The square root of 28771457 is about 5363.9031497595. The cubic root of 28771457 is about 306.4224766613.

It can be divided in two parts, 2877 and 1457, that added together give a palindrome (4334).

The spelling of 28771457 in words is "twenty-eight million, seven hundred seventy-one thousand, four hundred fifty-seven".