28553894 has 4 divisors (see below), whose sum is σ = 42830844. Its totient is φ = 14276946.

The previous prime is 28553891. The next prime is 28553911. The reversal of 28553894 is 49835582.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28553891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7138472 + ... + 7138475.

It is an arithmetic number, because the mean of its divisors is an integer number (10707711).

Almost surely, 2^28553894 is an apocalyptic number.

28553894 is a deficient number, since it is larger than the sum of its proper divisors (14276950).

28553894 is a wasteful number, since it uses less digits than its factorization.

28553894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14276949.

The product of its digits is 345600, while the sum is 44.

The square root of 28553894 is about 5343.5843775503. The cubic root of 28553894 is about 305.6481566952.

The spelling of 28553894 in words is "twenty-eight million, five hundred fifty-three thousand, eight hundred ninety-four".