40539815 has 16 divisors (see below), whose sum is σ = 51749280. Its totient is φ = 30382080.

The previous prime is 40539743. The next prime is 40539833. The reversal of 40539815 is 51893504.

It is not a de Polignac number, because 40539815 - 2¹⁶ = 40474279 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19496 + ... + 21474.

It is an arithmetic number, because the mean of its divisors is an integer number (3234330).

Almost surely, 2^40539815 is an apocalyptic number.

40539815 is a deficient number, since it is larger than the sum of its proper divisors (11209465).

40539815 is a wasteful number, since it uses less digits than its factorization.

40539815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2242.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 40539815 is about 6367.0884240758. The cubic root of 40539815 is about 343.5267712115.

The spelling of 40539815 in words is "forty million, five hundred thirty-nine thousand, eight hundred fifteen".