22400008 has 8 divisors (see below), whose sum is σ = 42000030. Its totient is φ = 11200000.

The previous prime is 22399991. The next prime is 22400009. The reversal of 22400008 is 80000422.

It can be written as a sum of positive squares in only one way, i.e., 18164644 + 4235364 = 4262^2 + 2058^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 22399964 and 22400000.

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, 1399993 + ... + 1400008.

Almost surely, 2^22400008 is an apocalyptic number.

It is an amenable number.

22400008 is a deficient number, since it is larger than the sum of its proper divisors (19600022).

22400008 is a wasteful number, since it uses less digits than its factorization.

22400008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800007 (or 2800003 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 22400008 is about 4732.8646716339. The cubic root of 22400008 is about 281.8919828412.

The spelling of 22400008 in words is "twenty-two million, four hundred thousand, eight".