23222440 has 16 divisors (see below), whose sum is σ = 52250580. Its totient is φ = 9288960.

The previous prime is 23222431. The next prime is 23222461. The reversal of 23222440 is 4422232.

It can be written as a sum of positive squares in 2 ways, for example, as 22335076 + 887364 = 4726^2 + 942^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 290241 + ... + 290320.

Almost surely, 2^23222440 is an apocalyptic number.

23222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23222440 is an abundant number, since it is smaller than the sum of its proper divisors (29028140).

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

23222440 is a wasteful number, since it uses less digits than its factorization.

23222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580572 (or 580568 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 23222440 is about 4818.9666942198. The cubic root of 23222440 is about 285.3005549928.

Adding to 23222440 its reverse (4422232), we get a palindrome (27644672).

The spelling of 23222440 in words is "twenty-three million, two hundred twenty-two thousand, four hundred forty".