28311478 has 8 divisors (see below), whose sum is σ = 45733968. Its totient is φ = 13066824.

The previous prime is 28311473. The next prime is 28311527. The reversal of 28311478 is 87411382.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28311473) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 544426 + ... + 544477.

It is an arithmetic number, because the mean of its divisors is an integer number (5716746).

Almost surely, 2^28311478 is an apocalyptic number.

28311478 is a deficient number, since it is larger than the sum of its proper divisors (17422490).

28311478 is a wasteful number, since it uses less digits than its factorization.

28311478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088918.

The product of its digits is 10752, while the sum is 34.

The square root of 28311478 is about 5320.8531270840. The cubic root of 28311478 is about 304.7807364348.

The spelling of 28311478 in words is "twenty-eight million, three hundred eleven thousand, four hundred seventy-eight".