22405798 has 4 divisors (see below), whose sum is σ = 33608700. Its totient is φ = 11202898.

The previous prime is 22405787. The next prime is 22405829. The reversal of 22405798 is 89750422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89750422 = 2 ⋅44875211.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5601448 + ... + 5601451.

It is an arithmetic number, because the mean of its divisors is an integer number (8402175).

Almost surely, 2^22405798 is an apocalyptic number.

22405798 is a deficient number, since it is larger than the sum of its proper divisors (11202902).

22405798 is a wasteful number, since it uses less digits than its factorization.

22405798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11202901.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 22405798 is about 4733.4763123945. The cubic root of 22405798 is about 281.9162687547.

The spelling of 22405798 in words is "twenty-two million, four hundred five thousand, seven hundred ninety-eight".