40005015 has 16 divisors (see below), whose sum is σ = 64281600. Its totient is φ = 21244832.

The previous prime is 40005011. The next prime is 40005023. The reversal of 40005015 is 51050004.

It is a cyclic number.

It is not a de Polignac number, because 40005015 - 2² = 40005011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 40004985 and 40005003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40005011) 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, 1995 + ... + 9164.

It is an arithmetic number, because the mean of its divisors is an integer number (4017600).

Almost surely, 2^40005015 is an apocalyptic number.

40005015 is a deficient number, since it is larger than the sum of its proper divisors (24276585).

40005015 is a wasteful number, since it uses less digits than its factorization.

40005015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11406.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 40005015 is about 6324.9517784723. The cubic root of 40005015 is about 342.0094812870.

Adding to 40005015 its reverse (51050004), we get a palindrome (91055019).

It can be divided in two parts, 400050 and 15, that added together give a triangular number (400065 = T₈₉₄).

The spelling of 40005015 in words is "forty million, five thousand, fifteen".