22000378 has 4 divisors (see below), whose sum is σ = 33000570. Its totient is φ = 11000188.

The previous prime is 22000373. The next prime is 22000379. The reversal of 22000378 is 87300022.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 21594609 + 405769 = 4647^2 + 637^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

22000378 is a modest number, since divided by 378 gives 22 as remainder.

It is not an unprimeable number, because it can be changed into a prime (22000373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5500093 + ... + 5500096.

Almost surely, 2^22000378 is an apocalyptic number.

22000378 is a deficient number, since it is larger than the sum of its proper divisors (11000192).

22000378 is a wasteful number, since it uses less digits than its factorization.

22000378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11000191.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 22000378 is about 4690.4560545857. The cubic root of 22000378 is about 280.2055378607.

The spelling of 22000378 in words is "twenty-two million, three hundred seventy-eight", and thus it is an aban number.