22478505 has 64 divisors (see below), whose sum is σ = 44582400. Its totient is φ = 9633792.

The previous prime is 22478497. The next prime is 22478507. The reversal of 22478505 is 50587422.

It is not a de Polignac number, because 22478505 - 2³ = 22478497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22478507) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 87337 + ... + 87593.

It is an arithmetic number, because the mean of its divisors is an integer number (696600).

Almost surely, 2^22478505 is an apocalyptic number.

It is an amenable number.

22478505 is a deficient number, since it is larger than the sum of its proper divisors (22103895).

22478505 is a wasteful number, since it uses less digits than its factorization.

22478505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 22478505 is about 4741.1501769086. The cubic root of 22478505 is about 282.2208797122.

The spelling of 22478505 in words is "twenty-two million, four hundred seventy-eight thousand, five hundred five".