40409007 has 4 divisors (see below), whose sum is σ = 53878680. Its totient is φ = 26939336.

The previous prime is 40408997. The next prime is 40409009. The reversal of 40409007 is 70090404.

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

It is a cyclic number.

It is not a de Polignac number, because 40409007 - 2⁶ = 40408943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40409009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6734832 + ... + 6734837.

It is an arithmetic number, because the mean of its divisors is an integer number (13469670).

Almost surely, 2^40409007 is an apocalyptic number.

40409007 is a deficient number, since it is larger than the sum of its proper divisors (13469673).

40409007 is a wasteful number, since it uses less digits than its factorization.

40409007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13469672.

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 40409007 is about 6356.8079253663. The cubic root of 40409007 is about 343.1568923014.

The spelling of 40409007 in words is "forty million, four hundred nine thousand, seven".