14815220 has 96 divisors (see below), whose sum is σ = 38320128. Its totient is φ = 4701312.

The previous prime is 14815189. The next prime is 14815223. The reversal of 14815220 is 2251841.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14815223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138407 + ... + 138513.

It is an arithmetic number, because the mean of its divisors is an integer number (399168).

Almost surely, 2^14815220 is an apocalyptic number.

14815220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14815220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19160064).

14815220 is an abundant number, since it is smaller than the sum of its proper divisors (23504908).

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

14815220 is a wasteful number, since it uses less digits than its factorization.

14815220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189 (or 187 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 14815220 is about 3849.0544293372. The cubic root of 14815220 is about 245.6043389614.

The spelling of 14815220 in words is "fourteen million, eight hundred fifteen thousand, two hundred twenty".