40720436 has 12 divisors (see below), whose sum is σ = 71635200. Its totient is φ = 20253240.

The previous prime is 40720429. The next prime is 40720447. The reversal of 40720436 is 63402704.

It is a happy number.

It is a congruent number.

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, 25886 + ... + 27413.

It is an arithmetic number, because the mean of its divisors is an integer number (5969600).

Almost surely, 2^40720436 is an apocalyptic number.

It is an amenable number.

40720436 is a deficient number, since it is larger than the sum of its proper divisors (30914764).

40720436 is a wasteful number, since it uses less digits than its factorization.

40720436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53494 (or 53492 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 40720436 is about 6381.2566160593. The cubic root of 40720436 is about 344.0361981919.

The spelling of 40720436 in words is "forty million, seven hundred twenty thousand, four hundred thirty-six".