28208454 has 16 divisors (see below), whose sum is σ = 56764992. Its totient is φ = 9344808.

The previous prime is 28208447. The next prime is 28208459. The reversal of 28208454 is 45480282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28208459) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13444 + ... + 15399.

It is an arithmetic number, because the mean of its divisors is an integer number (3547812).

Almost surely, 2^28208454 is an apocalyptic number.

28208454 is an abundant number, since it is smaller than the sum of its proper divisors (28556538).

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

28208454 is a wasteful number, since it uses less digits than its factorization.

28208454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29011.

The product of its (nonzero) digits is 20480, while the sum is 33.

The square root of 28208454 is about 5311.1631494429. The cubic root of 28208454 is about 304.4105933300.

The spelling of 28208454 in words is "twenty-eight million, two hundred eight thousand, four hundred fifty-four".