22728471 has 16 divisors (see below), whose sum is σ = 31511424. Its totient is φ = 14559264.

The previous prime is 22728457. The next prime is 22728491. The reversal of 22728471 is 17482722.

It is not a de Polignac number, because 22728471 - 2⁹ = 22727959 is a prime.

It is a super-3 number, since 3×22728471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22728491) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7980 + ... + 10446.

It is an arithmetic number, because the mean of its divisors is an integer number (1969464).

Almost surely, 2^22728471 is an apocalyptic number.

22728471 is a deficient number, since it is larger than the sum of its proper divisors (8782953).

22728471 is a wasteful number, since it uses less digits than its factorization.

22728471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2590.

The product of its digits is 12544, while the sum is 33.

The square root of 22728471 is about 4767.4386204754. The cubic root of 22728471 is about 283.2631455517.

The spelling of 22728471 in words is "twenty-two million, seven hundred twenty-eight thousand, four hundred seventy-one".