40392705 has 16 divisors (see below), whose sum is σ = 65096640. Its totient is φ = 21386688.

The previous prime is 40392691. The next prime is 40392707. The reversal of 40392705 is 50729304.

It is not a de Polignac number, because 40392705 - 2⁹ = 40392193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40392707) 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, 7602 + ... + 11771.

It is an arithmetic number, because the mean of its divisors is an integer number (4068540).

Almost surely, 2^40392705 is an apocalyptic number.

It is an amenable number.

40392705 is a deficient number, since it is larger than the sum of its proper divisors (24703935).

40392705 is a wasteful number, since it uses less digits than its factorization.

40392705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19520.

The product of its (nonzero) digits is 7560, while the sum is 30.

The square root of 40392705 is about 6355.5255486860. The cubic root of 40392705 is about 343.1107400818.

The spelling of 40392705 in words is "forty million, three hundred ninety-two thousand, seven hundred five".