406640415 has 8 divisors (see below), whose sum is σ = 650624688. Its totient is φ = 216874880.

The previous prime is 406640387. The next prime is 406640417. The reversal of 406640415 is 514046604.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 406640415 - 2⁸ = 406640159 is a prime.

It is a super-2 number, since 2×406640415² = 330712854222744450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406640417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13554666 + ... + 13554695.

It is an arithmetic number, because the mean of its divisors is an integer number (81328086).

Almost surely, 2^406640415 is an apocalyptic number.

406640415 is a deficient number, since it is larger than the sum of its proper divisors (243984273).

406640415 is a wasteful number, since it uses less digits than its factorization.

406640415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27109369.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 406640415 is about 20165.3270491703. The cubic root of 406640415 is about 740.8611930185.

The spelling of 406640415 in words is "four hundred six million, six hundred forty thousand, four hundred fifteen".