22400002 has 4 divisors (see below), whose sum is σ = 33600006. Its totient is φ = 11200000.

The previous prime is 22399991. The next prime is 22400009. The reversal of 22400002 is 20000422.

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., 17901361 + 4498641 = 4231^2 + 2121^2 .

It is not an unprimeable number, because it can be changed into a prime (22400009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5599999 + ... + 5600002.

Almost surely, 2^22400002 is an apocalyptic number.

22400002 is a deficient number, since it is larger than the sum of its proper divisors (11200004).

22400002 is a wasteful number, since it uses less digits than its factorization.

22400002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11200003.

The product of its (nonzero) digits is 32, while the sum is 10.

The square root of 22400002 is about 4732.8640377683. The cubic root of 22400002 is about 281.8919576722.

Adding to 22400002 its reverse (20000422), we get a palindrome (42400424).

The spelling of 22400002 in words is "twenty-two million, four hundred thousand, two".