40193728 has 28 divisors (see below), whose sum is σ = 79964280. Its totient is φ = 20045312.

The previous prime is 40193723. The next prime is 40193731. The reversal of 40193728 is 82739104.

It is a junction number, because it is equal to n+sod(n) for n = 40193693 and 40193702.

It is not an unprimeable number, because it can be changed into a prime (40193723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41700 + ... + 42652.

Almost surely, 2^40193728 is an apocalyptic number.

It is an amenable number.

40193728 is a deficient number, since it is larger than the sum of its proper divisors (39770552).

40193728 is an equidigital number, since it uses as much as digits as its factorization.

40193728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1624 (or 1614 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 40193728 is about 6339.8523642116. The cubic root of 40193728 is about 342.5464174218.

The spelling of 40193728 in words is "forty million, one hundred ninety-three thousand, seven hundred twenty-eight".