28422408 has 32 divisors (see below), whose sum is σ = 81207360. Its totient is φ = 8120640.

The previous prime is 28422403. The next prime is 28422409. The reversal of 28422408 is 80422482.

It is not an unprimeable number, because it can be changed into a prime (28422403) 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, 84423 + ... + 84758.

It is an arithmetic number, because the mean of its divisors is an integer number (2537730).

Almost surely, 2^28422408 is an apocalyptic number.

28422408 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28422408 is an abundant number, since it is smaller than the sum of its proper divisors (52784952).

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

28422408 is a wasteful number, since it uses less digits than its factorization.

28422408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169197 (or 169193 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 30.

The square root of 28422408 is about 5331.2670163855. The cubic root of 28422408 is about 305.1782815075.

The spelling of 28422408 in words is "twenty-eight million, four hundred twenty-two thousand, four hundred eight".