28390614 has 32 divisors (see below), whose sum is σ = 66479616. Its totient is φ = 7913280.

The previous prime is 28390613. The next prime is 28390619. The reversal of 28390614 is 41609382.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28390613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6522 + ... + 9965.

It is an arithmetic number, because the mean of its divisors is an integer number (2077488).

Almost surely, 2^28390614 is an apocalyptic number.

28390614 is an abundant number, since it is smaller than the sum of its proper divisors (38089002).

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

28390614 is a wasteful number, since it uses less digits than its factorization.

28390614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16540.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 28390614 is about 5328.2843392597. The cubic root of 28390614 is about 305.0644457565.

Adding to 28390614 its reverse (41609382), we get a palindrome (69999996).

The spelling of 28390614 in words is "twenty-eight million, three hundred ninety thousand, six hundred fourteen".