40842728 has 8 divisors (see below), whose sum is σ = 76580130. Its totient is φ = 20421360.

The previous prime is 40842727. The next prime is 40842743. The reversal of 40842728 is 82724804.

It can be written as a sum of positive squares in only one way, i.e., 27019204 + 13823524 = 5198^2 + 3718^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (40842727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2552663 + ... + 2552678.

Almost surely, 2^40842728 is an apocalyptic number.

It is an amenable number.

40842728 is a deficient number, since it is larger than the sum of its proper divisors (35737402).

40842728 is a wasteful number, since it uses less digits than its factorization.

40842728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105347 (or 5105343 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 35.

The square root of 40842728 is about 6390.8315577865. The cubic root of 40842728 is about 344.3802582522.

The spelling of 40842728 in words is "forty million, eight hundred forty-two thousand, seven hundred twenty-eight".