28014220 has 24 divisors (see below), whose sum is σ = 63355824. Its totient is φ = 10343616.

The previous prime is 28014197. The next prime is 28014221. The reversal of 28014220 is 2241082.

It is not an unprimeable number, because it can be changed into a prime (28014221) 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, 53614 + ... + 54133.

It is an arithmetic number, because the mean of its divisors is an integer number (2639826).

Almost surely, 2^28014220 is an apocalyptic number.

28014220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28014220 is an abundant number, since it is smaller than the sum of its proper divisors (35341604).

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

28014220 is a wasteful number, since it uses less digits than its factorization.

28014220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107769 (or 107767 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 28014220 is about 5292.8461152767. The cubic root of 28014220 is about 303.7102936012.

It can be divided in two parts, 2801 and 4220, that added together give a triangular number (7021 = T₁₁₈).

The spelling of 28014220 in words is "twenty-eight million, fourteen thousand, two hundred twenty".