28891476 has 36 divisors (see below), whose sum is σ = 76876800. Its totient is φ = 9123408.

The previous prime is 28891469. The next prime is 28891477. The reversal of 28891476 is 67419882.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28891477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20436 + ... + 21803.

Almost surely, 2^28891476 is an apocalyptic number.

It is an amenable number.

28891476 is an abundant number, since it is smaller than the sum of its proper divisors (47985324).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28891476 is a wasteful number, since it uses less digits than its factorization.

28891476 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42268 (or 42263 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 28891476 is about 5375.0791622078. The cubic root of 28891476 is about 306.8479620088.

The spelling of 28891476 in words is "twenty-eight million, eight hundred ninety-one thousand, four hundred seventy-six".