28877457 has 8 divisors (see below), whose sum is σ = 44003776. Its totient is φ = 16501392.

The previous prime is 28877447. The next prime is 28877477. The reversal of 28877457 is 75477882.

It is a happy number.

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

It is not a de Polignac number, because 28877457 - 2¹¹ = 28875409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28877447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 687538 + ... + 687579.

It is an arithmetic number, because the mean of its divisors is an integer number (5500472).

Almost surely, 2^28877457 is an apocalyptic number.

It is an amenable number.

28877457 is a deficient number, since it is larger than the sum of its proper divisors (15126319).

28877457 is a wasteful number, since it uses less digits than its factorization.

28877457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375127.

The product of its digits is 878080, while the sum is 48.

The square root of 28877457 is about 5373.7749301585. The cubic root of 28877457 is about 306.7983234056.

The spelling of 28877457 in words is "twenty-eight million, eight hundred seventy-seven thousand, four hundred fifty-seven".