22071998 has 8 divisors (see below), whose sum is σ = 35654808. Its totient is φ = 10187064.

The previous prime is 22071979. The next prime is 22072007. The reversal of 22071998 is 89917022.

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

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 in 3 ways as a sum of consecutive naturals, for example, 424436 + ... + 424487.

It is an arithmetic number, because the mean of its divisors is an integer number (4456851).

Almost surely, 2^22071998 is an apocalyptic number.

22071998 is a deficient number, since it is larger than the sum of its proper divisors (13582810).

22071998 is a wasteful number, since it uses less digits than its factorization.

22071998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848938.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 22071998 is about 4698.0845032843. The cubic root of 22071998 is about 280.5092687500.

The spelling of 22071998 in words is "twenty-two million, seventy-one thousand, nine hundred ninety-eight".