426640015 has 8 divisors (see below), whose sum is σ = 512476560. Its totient is φ = 340972992.

The previous prime is 426640013. The next prime is 426640021. The reversal of 426640015 is 510046624.

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

It is a cyclic number.

It is not a de Polignac number, because 426640015 - 2¹ = 426640013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426640013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36774 + ... + 46963.

It is an arithmetic number, because the mean of its divisors is an integer number (64059570).

Almost surely, 2^426640015 is an apocalyptic number.

426640015 is a deficient number, since it is larger than the sum of its proper divisors (85836545).

426640015 is a wasteful number, since it uses less digits than its factorization.

426640015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84761.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 426640015 is about 20655.2660355658. The cubic root of 426640015 is about 752.8131476668.

Adding to 426640015 its reverse (510046624), we get a palindrome (936686639).

The spelling of 426640015 in words is "four hundred twenty-six million, six hundred forty thousand, fifteen".