28001358 has 96 divisors (see below), whose sum is σ = 76826880. Its totient is φ = 7159680.

The previous prime is 28001357. The next prime is 28001359. The reversal of 28001358 is 85310082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (28001357) and next prime (28001359).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28001353) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 123241 + ... + 123467.

It is an arithmetic number, because the mean of its divisors is an integer number (800280).

Almost surely, 2^28001358 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28001358, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38413440).

28001358 is an abundant number, since it is smaller than the sum of its proper divisors (48825522).

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

28001358 is a wasteful number, since it uses less digits than its factorization.

28001358 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 342 (or 339 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 28001358 is about 5291.6309395119. The cubic root of 28001358 is about 303.6638062604.

The spelling of 28001358 in words is "twenty-eight million, one thousand, three hundred fifty-eight".