40728502 has 4 divisors (see below), whose sum is σ = 61092756. Its totient is φ = 20364250.

The previous prime is 40728491. The next prime is 40728503. The reversal of 40728502 is 20582704.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40728503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10182124 + ... + 10182127.

It is an arithmetic number, because the mean of its divisors is an integer number (15273189).

Almost surely, 2^40728502 is an apocalyptic number.

40728502 is a deficient number, since it is larger than the sum of its proper divisors (20364254).

40728502 is a wasteful number, since it uses less digits than its factorization.

40728502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20364253.

The product of its (nonzero) digits is 4480, while the sum is 28.

The square root of 40728502 is about 6381.8885919452. Note that the first 3 decimals coincide. The cubic root of 40728502 is about 344.0589125260.

The spelling of 40728502 in words is "forty million, seven hundred twenty-eight thousand, five hundred two".