22991798 has 4 divisors (see below), whose sum is σ = 34487700. Its totient is φ = 11495898.

The previous prime is 22991753. The next prime is 22991827. The reversal of 22991798 is 89719922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5747948 + ... + 5747951.

It is an arithmetic number, because the mean of its divisors is an integer number (8621925).

Almost surely, 2^22991798 is an apocalyptic number.

22991798 is a deficient number, since it is larger than the sum of its proper divisors (11495902).

22991798 is a wasteful number, since it uses less digits than its factorization.

22991798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11495901.

The product of its digits is 163296, while the sum is 47.

The square root of 22991798 is about 4794.9763294515. The cubic root of 22991798 is about 284.3528890428.

The spelling of 22991798 in words is "twenty-two million, nine hundred ninety-one thousand, seven hundred ninety-eight".