28057469 has 8 divisors (see below), whose sum is σ = 30719712. Its totient is φ = 25413840.

The previous prime is 28057459. The next prime is 28057481. The reversal of 28057469 is 96475082.

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 28057469 - 2²⁴ = 11280253 is a prime.

It is a super-2 number, since 2×28057469² = 1574443133371922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28057409) 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, 1394 + ... + 7619.

It is an arithmetic number, because the mean of its divisors is an integer number (3839964).

Almost surely, 2^28057469 is an apocalyptic number.

It is an amenable number.

28057469 is a deficient number, since it is larger than the sum of its proper divisors (2662243).

28057469 is a wasteful number, since it uses less digits than its factorization.

28057469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9307.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 28057469 is about 5296.9301486805. The cubic root of 28057469 is about 303.8665048970.

The spelling of 28057469 in words is "twenty-eight million, fifty-seven thousand, four hundred sixty-nine".