40872815 has 4 divisors (see below), whose sum is σ = 49047384. Its totient is φ = 32698248.

The previous prime is 40872779. The next prime is 40872847. The reversal of 40872815 is 51827804.

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 40872815 - 2²² = 36678511 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4087277 + ... + 4087286.

It is an arithmetic number, because the mean of its divisors is an integer number (12261846).

Almost surely, 2^40872815 is an apocalyptic number.

40872815 is a deficient number, since it is larger than the sum of its proper divisors (8174569).

40872815 is an equidigital number, since it uses as much as digits as its factorization.

40872815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8174568.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 40872815 is about 6393.1850434662. The cubic root of 40872815 is about 344.4648006430.

The spelling of 40872815 in words is "forty million, eight hundred seventy-two thousand, eight hundred fifteen".