22628015 has 4 divisors (see below), whose sum is σ = 27153624. Its totient is φ = 18102408.

The previous prime is 22627991. The next prime is 22628017. The reversal of 22628015 is 51082622.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51082622 = 2 ⋅25541311.

It is a cyclic number.

It is not a de Polignac number, because 22628015 - 2¹² = 22623919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22628017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2262797 + ... + 2262806.

It is an arithmetic number, because the mean of its divisors is an integer number (6788406).

Almost surely, 2^22628015 is an apocalyptic number.

22628015 is a deficient number, since it is larger than the sum of its proper divisors (4525609).

22628015 is an equidigital number, since it uses as much as digits as its factorization.

22628015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4525608.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 22628015 is about 4756.8913168161. The cubic root of 22628015 is about 282.8452041278.

The spelling of 22628015 in words is "twenty-two million, six hundred twenty-eight thousand, fifteen".