22738440 has 64 divisors (see below), whose sum is σ = 71812800. Its totient is φ = 5743872.

The previous prime is 22738439. The next prime is 22738481. The reversal of 22738440 is 4483722.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 22738398 and 22738407.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2707 + ... + 7266.

It is an arithmetic number, because the mean of its divisors is an integer number (1122075).

Almost surely, 2^22738440 is an apocalyptic number.

22738440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22738440 is an abundant number, since it is smaller than the sum of its proper divisors (49074360).

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

22738440 is a wasteful number, since it uses less digits than its factorization.

22738440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10006 (or 10002 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 22738440 is about 4768.4840358336. The cubic root of 22738440 is about 283.3045537858.

The spelling of 22738440 in words is "twenty-two million, seven hundred thirty-eight thousand, four hundred forty".