28247408 has 20 divisors (see below), whose sum is σ = 62548080. Its totient is φ = 12105984.

The previous prime is 28247407. The next prime is 28247447. The reversal of 28247408 is 80474282.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28247407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125993 + ... + 126216.

It is an arithmetic number, because the mean of its divisors is an integer number (3127404).

Almost surely, 2^28247408 is an apocalyptic number.

28247408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28247408 is an abundant number, since it is smaller than the sum of its proper divisors (34300672).

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

28247408 is a wasteful number, since it uses less digits than its factorization.

28247408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252224 (or 252218 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 28247408 is about 5314.8290659249. The cubic root of 28247408 is about 304.5506524775.

It can be divided in two parts, 28 and 247408, that multiplied together give a square (6927424 = 2632²).

The spelling of 28247408 in words is "twenty-eight million, two hundred forty-seven thousand, four hundred eight".