40784728 has 8 divisors (see below), whose sum is σ = 76471380. Its totient is φ = 20392360.

The previous prime is 40784707. The next prime is 40784741. The reversal of 40784728 is 82748704.

It is a happy number.

40784728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2549038 + ... + 2549053.

Almost surely, 2^40784728 is an apocalyptic number.

It is an amenable number.

40784728 is a deficient number, since it is larger than the sum of its proper divisors (35686652).

40784728 is a wasteful number, since it uses less digits than its factorization.

40784728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5098097 (or 5098093 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 40784728 is about 6386.2921950064. The cubic root of 40784728 is about 344.2171650216.

The spelling of 40784728 in words is "forty million, seven hundred eighty-four thousand, seven hundred twenty-eight".