28427334 has 32 divisors (see below), whose sum is σ = 61979904. Its totient is φ = 8639520.

The previous prime is 28427327. The next prime is 28427353. The reversal of 28427334 is 43372482.

It is a super-2 number, since 2×28427334² = 1616226636695112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28427295 and 28427304.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4279 + ... + 8669.

It is an arithmetic number, because the mean of its divisors is an integer number (1936872).

Almost surely, 2^28427334 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28427334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30989952).

28427334 is an abundant number, since it is smaller than the sum of its proper divisors (33552570).

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

28427334 is a wasteful number, since it uses less digits than its factorization.

28427334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4492.

The product of its digits is 32256, while the sum is 33.

The square root of 28427334 is about 5331.7289878613. The cubic root of 28427334 is about 305.1959110409.

The spelling of 28427334 in words is "twenty-eight million, four hundred twenty-seven thousand, three hundred thirty-four".