40728236 has 12 divisors (see below), whose sum is σ = 72443280. Its totient is φ = 20030160.

The previous prime is 40728217. The next prime is 40728241. The reversal of 40728236 is 63282704.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83216 + ... + 83703.

It is an arithmetic number, because the mean of its divisors is an integer number (6036940).

Almost surely, 2^40728236 is an apocalyptic number.

It is an amenable number.

40728236 is a deficient number, since it is larger than the sum of its proper divisors (31715044).

40728236 is a wasteful number, since it uses less digits than its factorization.

40728236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166984 (or 166982 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 40728236 is about 6381.8677516852. The cubic root of 40728236 is about 344.0581635021.

The spelling of 40728236 in words is "forty million, seven hundred twenty-eight thousand, two hundred thirty-six".