22742040 has 32 divisors (see below), whose sum is σ = 68226480. Its totient is φ = 6064512.

The previous prime is 22742023. The next prime is 22742047. The reversal of 22742040 is 4024722.

It is a junction number, because it is equal to n+sod(n) for n = 22741998 and 22742016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22742047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 94639 + ... + 94878.

Almost surely, 2^22742040 is an apocalyptic number.

22742040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22742040 is an abundant number, since it is smaller than the sum of its proper divisors (45484440).

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

22742040 is a wasteful number, since it uses less digits than its factorization.

22742040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 189531 (or 189527 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 21.

The square root of 22742040 is about 4768.8614993518. The cubic root of 22742040 is about 283.3195041309.

Adding to 22742040 its reverse (4024722), we get a palindrome (26766762).

The spelling of 22742040 in words is "twenty-two million, seven hundred forty-two thousand, forty".