40338428 has 12 divisors (see below), whose sum is σ = 76022520. Its totient is φ = 18617712.

The previous prime is 40338407. The next prime is 40338439. The reversal of 40338428 is 82483304.

It is a super-2 number, since 2×40338428² = 3254377547022368, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40338394 and 40338403.

It is a congruent number.

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, 387818 + ... + 387921.

It is an arithmetic number, because the mean of its divisors is an integer number (6335210).

Almost surely, 2^40338428 is an apocalyptic number.

It is an amenable number.

40338428 is a deficient number, since it is larger than the sum of its proper divisors (35684092).

40338428 is a wasteful number, since it uses less digits than its factorization.

40338428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 775756 (or 775754 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 40338428 is about 6351.2540493984. The cubic root of 40338428 is about 342.9569881495.

The spelling of 40338428 in words is "forty million, three hundred thirty-eight thousand, four hundred twenty-eight".