22405898 has 8 divisors (see below), whose sum is σ = 35585892. Its totient is φ = 10543936.

The previous prime is 22405897. The next prime is 22405913. The reversal of 22405898 is 89850422.

It can be written as a sum of positive squares in 2 ways, for example, as 20043529 + 2362369 = 4477^2 + 1537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (22405891) 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, 329465 + ... + 329532.

Almost surely, 2^22405898 is an apocalyptic number.

22405898 is a deficient number, since it is larger than the sum of its proper divisors (13179994).

22405898 is a wasteful number, since it uses less digits than its factorization.

22405898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 659016.

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 22405898 is about 4733.4868754439. The cubic root of 22405898 is about 281.9166881638.

The spelling of 22405898 in words is "twenty-two million, four hundred five thousand, eight hundred ninety-eight".