22400007 has 12 divisors (see below), whose sum is σ = 34743096. Its totient is φ = 12799920.

The previous prime is 22399991. The next prime is 22400009. The reversal of 22400007 is 70000422.

It is not a de Polignac number, because 22400007 - 2⁴ = 22399991 is a prime.

It is a congruent number.

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 in 11 ways as a sum of consecutive naturals, for example, 76044 + ... + 76337.

It is an arithmetic number, because the mean of its divisors is an integer number (2895258).

Almost surely, 2^22400007 is an apocalyptic number.

22400007 is a deficient number, since it is larger than the sum of its proper divisors (12343089).

22400007 is a wasteful number, since it uses less digits than its factorization.

22400007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152398 (or 152391 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 22400007 is about 4732.8645659896. The cubic root of 22400007 is about 281.8919786463.

Adding to 22400007 its reverse (70000422), we get a palindrome (92400429).

The spelling of 22400007 in words is "twenty-two million, four hundred thousand, seven".