28888477 has 8 divisors (see below), whose sum is σ = 29688120. Its totient is φ = 28093440.

The previous prime is 28888469. The next prime is 28888481. The reversal of 28888477 is 77488882.

It can be written as a sum of positive squares in 4 ways, for example, as 436921 + 28451556 = 661^2 + 5334^2 .

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 28888477 - 2³ = 28888469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28888427) 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, 14349 + ... + 16237.

It is an arithmetic number, because the mean of its divisors is an integer number (3711015).

Almost surely, 2^28888477 is an apocalyptic number.

It is an amenable number.

28888477 is a deficient number, since it is larger than the sum of its proper divisors (799643).

28888477 is a wasteful number, since it uses less digits than its factorization.

28888477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303.

The product of its digits is 1605632, while the sum is 52.

The square root of 28888477 is about 5374.8001823324. The cubic root of 28888477 is about 306.8373444725.

The spelling of 28888477 in words is "twenty-eight million, eight hundred eighty-eight thousand, four hundred seventy-seven".