28425558 has 64 divisors (see below), whose sum is σ = 69120000. Its totient is φ = 7612704.

The previous prime is 28425557. The next prime is 28425563. The reversal of 28425558 is 85552482.

It is a super-3 number, since 3×28425558³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28425557) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142743 + ... + 142941.

It is an arithmetic number, because the mean of its divisors is an integer number (1080000).

Almost surely, 2^28425558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28425558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34560000).

28425558 is an abundant number, since it is smaller than the sum of its proper divisors (40694442).

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

28425558 is a wasteful number, since it uses less digits than its factorization.

28425558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409.

The product of its digits is 128000, while the sum is 39.

The square root of 28425558 is about 5331.5624351591. The cubic root of 28425558 is about 305.1895551954.

The spelling of 28425558 in words is "twenty-eight million, four hundred twenty-five thousand, five hundred fifty-eight".