28493108 has 36 divisors (see below), whose sum is σ = 59586660. Its totient is φ = 11878272.

The previous prime is 28493107. The next prime is 28493111. The reversal of 28493108 is 80139482.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15038884 + 13454224 = 3878^2 + 3668^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28493107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5288 + ... + 9216.

It is an arithmetic number, because the mean of its divisors is an integer number (1655185).

Almost surely, 2^28493108 is an apocalyptic number.

28493108 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28493108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29793330).

28493108 is an abundant number, since it is smaller than the sum of its proper divisors (31093552).

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

28493108 is a wasteful number, since it uses less digits than its factorization.

28493108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3984 (or 3975 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 28493108 is about 5337.8935920455. The cubic root of 28493108 is about 305.4311129962.

The spelling of 28493108 in words is "twenty-eight million, four hundred ninety-three thousand, one hundred eight".