28851814 has 4 divisors (see below), whose sum is σ = 43277724. Its totient is φ = 14425906.

The previous prime is 28851811. The next prime is 28851829. The reversal of 28851814 is 41815882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41815882 = 2 ⋅20907941.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28851811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7212952 + ... + 7212955.

It is an arithmetic number, because the mean of its divisors is an integer number (10819431).

Almost surely, 2^28851814 is an apocalyptic number.

28851814 is a deficient number, since it is larger than the sum of its proper divisors (14425910).

28851814 is a wasteful number, since it uses less digits than its factorization.

28851814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14425909.

The product of its digits is 20480, while the sum is 37.

The square root of 28851814 is about 5371.3884610964. The cubic root of 28851814 is about 306.7074848524.

The spelling of 28851814 in words is "twenty-eight million, eight hundred fifty-one thousand, eight hundred fourteen".