22487240 has 16 divisors (see below), whose sum is σ = 50596380. Its totient is φ = 8994880.

The previous prime is 22487239. The next prime is 22487249. The reversal of 22487240 is 4278422.

It can be written as a sum of positive squares in 2 ways, for example, as 22486564 + 676 = 4742^2 + 26^2 .

It is not an unprimeable number, because it can be changed into a prime (22487249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281051 + ... + 281130.

Almost surely, 2^22487240 is an apocalyptic number.

22487240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22487240 is an abundant number, since it is smaller than the sum of its proper divisors (28109140).

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

22487240 is a wasteful number, since it uses less digits than its factorization.

22487240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562192 (or 562188 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 22487240 is about 4742.0712774061. The cubic root of 22487240 is about 282.2574313740.

The spelling of 22487240 in words is "twenty-two million, four hundred eighty-seven thousand, two hundred forty".