22308738 has 32 divisors (see below), whose sum is σ = 45895680. Its totient is φ = 7225680.

The previous prime is 22308733. The next prime is 22308763. The reversal of 22308738 is 83780322.

It is a happy number.

It is a super-3 number, since 3×22308738³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22308699 and 22308708.

It is not an unprimeable number, because it can be changed into a prime (22308733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67233 + ... + 67563.

It is an arithmetic number, because the mean of its divisors is an integer number (1434240).

Almost surely, 2^22308738 is an apocalyptic number.

22308738 is an abundant number, since it is smaller than the sum of its proper divisors (23586942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22308738 is a wasteful number, since it uses less digits than its factorization.

22308738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 22308738 is about 4723.2126778285. The cubic root of 22308738 is about 281.5086004732.

The spelling of 22308738 in words is "twenty-two million, three hundred eight thousand, seven hundred thirty-eight".