28028366 has 8 divisors (see below), whose sum is σ = 42110064. Its totient is φ = 13991680.

The previous prime is 28028347. The next prime is 28028381. The reversal of 28028366 is 66382082.

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

It is a super-3 number, since 3×28028366³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9650 + ... + 12213.

It is an arithmetic number, because the mean of its divisors is an integer number (5263758).

Almost surely, 2^28028366 is an apocalyptic number.

28028366 is a deficient number, since it is larger than the sum of its proper divisors (14081698).

28028366 is a wasteful number, since it uses less digits than its factorization.

28028366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22506.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 28028366 is about 5294.1822786904. The cubic root of 28028366 is about 303.7614052969.

The spelling of 28028366 in words is "twenty-eight million, twenty-eight thousand, three hundred sixty-six".