40753728 has 42 divisors (see below), whose sum is σ = 116814854. Its totient is φ = 13584384.

The previous prime is 40753721. The next prime is 40753753. The reversal of 40753728 is 82735704.

It can be written as a sum of positive squares in only one way, i.e., 29942784 + 10810944 = 5472^2 + 3288^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 40753692 and 40753701.

It is not an unprimeable number, because it can be changed into a prime (40753721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34801 + ... + 35952.

Almost surely, 2^40753728 is an apocalyptic number.

40753728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

40753728 is an abundant number, since it is smaller than the sum of its proper divisors (76061126).

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

40753728 is a wasteful number, since it uses less digits than its factorization.

40753728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70771 (or 70758 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 40753728 is about 6383.8646602195. The cubic root of 40753728 is about 344.1299310874.

The spelling of 40753728 in words is "forty million, seven hundred fifty-three thousand, seven hundred twenty-eight".