22400272 has 10 divisors (see below), whose sum is σ = 43400558. Its totient is φ = 11200128.

The previous prime is 22400251. The next prime is 22400293. The reversal of 22400272 is 27200422.

It is an interprime number because it is at equal distance from previous prime (22400251) and next prime (22400293).

It can be written as a sum of positive squares in only one way, i.e., 14470416 + 7929856 = 3804^2 + 2816^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 699993 + ... + 700024.

Almost surely, 2^22400272 is an apocalyptic number.

It is an amenable number.

22400272 is a deficient number, since it is larger than the sum of its proper divisors (21000286).

22400272 is a wasteful number, since it uses less digits than its factorization.

22400272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1400025 (or 1400019 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 22400272 is about 4732.8925616371. The cubic root of 22400272 is about 281.8930902692.

Adding to 22400272 its reverse (27200422), we get a palindrome (49600694).

The spelling of 22400272 in words is "twenty-two million, four hundred thousand, two hundred seventy-two".