22007240 has 16 divisors (see below), whose sum is σ = 49516380. Its totient is φ = 8802880.

The previous prime is 22007221. The next prime is 22007257. The reversal of 22007240 is 4270022.

It can be written as a sum of positive squares in 2 ways, for example, as 20921476 + 1085764 = 4574^2 + 1042^2 .

It is a super-2 number, since 2×22007240² = 968637224835200, which contains 22 as substring.

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, 275051 + ... + 275130.

Almost surely, 2^22007240 is an apocalyptic number.

22007240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22007240 is an abundant number, since it is smaller than the sum of its proper divisors (27509140).

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

22007240 is a wasteful number, since it uses less digits than its factorization.

22007240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550192 (or 550188 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 22007240 is about 4691.1874829301. The cubic root of 22007240 is about 280.2346672167.

Adding to 22007240 its reverse (4270022), we get a palindrome (26277262).

The spelling of 22007240 in words is "twenty-two million, seven thousand, two hundred forty".