22400146 has 8 divisors (see below), whose sum is σ = 33649740. Its totient is φ = 11183568.

The previous prime is 22400111. The next prime is 22400149. The reversal of 22400146 is 64100422.

It can be written as a sum of positive squares in 2 ways, for example, as 22231225 + 168921 = 4715^2 + 411^2 .

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 (22400149) 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, 6481 + ... + 9316.

Almost surely, 2^22400146 is an apocalyptic number.

22400146 is a deficient number, since it is larger than the sum of its proper divisors (11249594).

22400146 is a wasteful number, since it uses less digits than its factorization.

22400146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16508.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 22400146 is about 4732.8792505197. The cubic root of 22400146 is about 281.8925617251.

Adding to 22400146 its reverse (64100422), we get a palindrome (86500568).

The spelling of 22400146 in words is "twenty-two million, four hundred thousand, one hundred forty-six".