28801458 has 48 divisors (see below), whose sum is σ = 71772480. Its totient is φ = 8176608.

The previous prime is 28801457. The next prime is 28801471. The reversal of 28801458 is 85410882.

It is not an unprimeable number, because it can be changed into a prime (28801457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21916 + ... + 23192.

It is an arithmetic number, because the mean of its divisors is an integer number (1495260).

Almost surely, 2^28801458 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28801458, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35886240).

28801458 is an abundant number, since it is smaller than the sum of its proper divisors (42971022).

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

28801458 is a wasteful number, since it uses less digits than its factorization.

28801458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471 (or 1468 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28801458 is about 5366.6989854099. The cubic root of 28801458 is about 306.5289454588.

The spelling of 28801458 in words is "twenty-eight million, eight hundred one thousand, four hundred fifty-eight".