28414220 has 24 divisors (see below), whose sum is σ = 60392304. Its totient is φ = 11228096.

The previous prime is 28414219. The next prime is 28414237. The reversal of 28414220 is 2241482.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6899 + ... + 10218.

It is an arithmetic number, because the mean of its divisors is an integer number (2516346).

Almost surely, 2^28414220 is an apocalyptic number.

28414220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28414220 is an abundant number, since it is smaller than the sum of its proper divisors (31978084).

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

28414220 is a wasteful number, since it uses less digits than its factorization.

28414220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17209 (or 17207 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 28414220 is about 5330.4990385516. The cubic root of 28414220 is about 305.1489731796.

The spelling of 28414220 in words is "twenty-eight million, four hundred fourteen thousand, two hundred twenty".