28480887 has 6 divisors (see below), whose sum is σ = 41139072. Its totient is φ = 18987252.

The previous prime is 28480883. The next prime is 28480897. The reversal of 28480887 is 78808482.

It is not a de Polignac number, because 28480887 - 2² = 28480883 is a prime.

It is a super-2 number, since 2×28480887² = 1622321848613538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28480883) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1582263 + ... + 1582280.

It is an arithmetic number, because the mean of its divisors is an integer number (6856512).

Almost surely, 2^28480887 is an apocalyptic number.

28480887 is a deficient number, since it is larger than the sum of its proper divisors (12658185).

28480887 is a wasteful number, since it uses less digits than its factorization.

28480887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3164549 (or 3164546 counting only the distinct ones).

The product of its (nonzero) digits is 229376, while the sum is 45.

The square root of 28480887 is about 5336.7487293295. The cubic root of 28480887 is about 305.3874391902.

The spelling of 28480887 in words is "twenty-eight million, four hundred eighty thousand, eight hundred eighty-seven".