28318928 has 20 divisors (see below), whose sum is σ = 59856288. Its totient is φ = 12872160.

The previous prime is 28318921. The next prime is 28318933. The reversal of 28318928 is 82981382.

28318928 = T₄₇₇ + T₄₇₈ + ... + T₆₅₂.

It is a happy number.

It is a super-4 number, since 4×28318928⁴ (a number of 31 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28318921) 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, 80276 + ... + 80627.

Almost surely, 2^28318928 is an apocalyptic number.

It is an amenable number.

28318928 is an abundant number, since it is smaller than the sum of its proper divisors (31537360).

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

28318928 is a wasteful number, since it uses less digits than its factorization.

28318928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160922 (or 160916 counting only the distinct ones).

The product of its digits is 55296, while the sum is 41.

The square root of 28318928 is about 5321.5531567391. The cubic root of 28318928 is about 304.8074678468.

The spelling of 28318928 in words is "twenty-eight million, three hundred eighteen thousand, nine hundred twenty-eight".