426128647 has 12 divisors (see below), whose sum is σ = 524860560. Its totient is φ = 343766976.

The previous prime is 426128629. The next prime is 426128657. The reversal of 426128647 is 746821624.

It is a happy number.

It is not a de Polignac number, because 426128647 - 2¹¹ = 426126599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426128617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 254947 + ... + 256612.

It is an arithmetic number, because the mean of its divisors is an integer number (43738380).

Almost surely, 2^426128647 is an apocalyptic number.

426128647 is a deficient number, since it is larger than the sum of its proper divisors (98731913).

426128647 is a wasteful number, since it uses less digits than its factorization.

426128647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511590 (or 511583 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 426128647 is about 20642.8836890586. The cubic root of 426128647 is about 752.5122550735.

The spelling of 426128647 in words is "four hundred twenty-six million, one hundred twenty-eight thousand, six hundred forty-seven".