426626638 has 8 divisors (see below), whose sum is σ = 641468520. Its totient is φ = 212803800.

The previous prime is 426626621. The next prime is 426626657. The reversal of 426626638 is 836626624.

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

It is a junction number, because it is equal to n+sod(n) for n = 426626594 and 426626603.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 253713 + ... + 255388.

It is an arithmetic number, because the mean of its divisors is an integer number (80183565).

Almost surely, 2^426626638 is an apocalyptic number.

426626638 is a deficient number, since it is larger than the sum of its proper divisors (214841882).

426626638 is a wasteful number, since it uses less digits than its factorization.

426626638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509522.

The product of its digits is 497664, while the sum is 43.

The square root of 426626638 is about 20654.9422173000. The cubic root of 426626638 is about 752.8052796076.

The spelling of 426626638 in words is "four hundred twenty-six million, six hundred twenty-six thousand, six hundred thirty-eight".