40408807 has 4 divisors (see below), whose sum is σ = 40779640. Its totient is φ = 40037976.

The previous prime is 40408783. The next prime is 40408831. The reversal of 40408807 is 70880404.

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

It is an interprime number because it is at equal distance from previous prime (40408783) and next prime (40408831).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40408807 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408867) 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, 185253 + ... + 185470.

It is an arithmetic number, because the mean of its divisors is an integer number (10194910).

Almost surely, 2^40408807 is an apocalyptic number.

40408807 is a deficient number, since it is larger than the sum of its proper divisors (370833).

40408807 is a wasteful number, since it uses less digits than its factorization.

40408807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370832.

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 40408807 is about 6356.7921941810. The cubic root of 40408807 is about 343.1563261612.

The spelling of 40408807 in words is "forty million, four hundred eight thousand, eight hundred seven".