40724405 has 16 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 31781568.

The previous prime is 40724377. The next prime is 40724407. The reversal of 40724405 is 50442704.

It is a cyclic number.

It is not a de Polignac number, because 40724405 - 2²⁰ = 39675829 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40724407) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63014 + ... + 63656.

It is an arithmetic number, because the mean of its divisors is an integer number (3129840).

Almost surely, 2^40724405 is an apocalyptic number.

It is an amenable number.

40724405 is a deficient number, since it is larger than the sum of its proper divisors (9353035).

40724405 is a wasteful number, since it uses less digits than its factorization.

40724405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940.

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 40724405 is about 6381.5675973855. The cubic root of 40724405 is about 344.0473755060.

The spelling of 40724405 in words is "forty million, seven hundred twenty-four thousand, four hundred five".