15428222 has 4 divisors (see below), whose sum is σ = 23142336. Its totient is φ = 7714110.

The previous prime is 15428221. The next prime is 15428249. The reversal of 15428222 is 22282451.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 15428191 and 15428200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15428221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3857054 + ... + 3857057.

It is an arithmetic number, because the mean of its divisors is an integer number (5785584).

Almost surely, 2^15428222 is an apocalyptic number.

15428222 is a deficient number, since it is larger than the sum of its proper divisors (7714114).

15428222 is an equidigital number, since it uses as much as digits as its factorization.

15428222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7714113.

The product of its digits is 2560, while the sum is 26.

The square root of 15428222 is about 3927.8775439161. The cubic root of 15428222 is about 248.9460805923.

The spelling of 15428222 in words is "fifteen million, four hundred twenty-eight thousand, two hundred twenty-two".