28587457 has 8 divisors (see below), whose sum is σ = 30505760. Its totient is φ = 26710560.

The previous prime is 28587443. The next prime is 28587463. The reversal of 28587457 is 75478582.

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 28587457 - 2¹¹ = 28585409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28587407) 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, 8919 + ... + 11692.

It is an arithmetic number, because the mean of its divisors is an integer number (3813220).

Almost surely, 2^28587457 is an apocalyptic number.

It is an amenable number.

28587457 is a deficient number, since it is larger than the sum of its proper divisors (1918303).

28587457 is a wasteful number, since it uses less digits than its factorization.

28587457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20703.

The product of its digits is 627200, while the sum is 46.

The square root of 28587457 is about 5346.7239502335. The cubic root of 28587457 is about 305.7678654390.

The spelling of 28587457 in words is "twenty-eight million, five hundred eighty-seven thousand, four hundred fifty-seven".