22478401 has 4 divisors (see below), whose sum is σ = 24521904. Its totient is φ = 20434900.

The previous prime is 22478399. The next prime is 22478419. The reversal of 22478401 is 10487422.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22478401 - 2¹ = 22478399 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22478401.

It is not an unprimeable number, because it can be changed into a prime (22478461) 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, 1021735 + ... + 1021756.

It is an arithmetic number, because the mean of its divisors is an integer number (6130476).

Almost surely, 2^22478401 is an apocalyptic number.

It is an amenable number.

22478401 is a deficient number, since it is larger than the sum of its proper divisors (2043503).

22478401 is a wasteful number, since it uses less digits than its factorization.

22478401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043502.

The product of its (nonzero) digits is 3584, while the sum is 28.

The square root of 22478401 is about 4741.1392090931. The cubic root of 22478401 is about 282.2204444665.

It can be divided in two parts, 2247 and 8401, that added together give a cube (10648 = 22³).

The spelling of 22478401 in words is "twenty-two million, four hundred seventy-eight thousand, four hundred one".