726427431 has 12 divisors (see below), whose sum is σ = 1053021840. Its totient is φ = 482559840.

The previous prime is 726427397. The next prime is 726427439. The reversal of 726427431 is 134724627.

726427431 is a `hidden beast` number, since 7 + 2 + 642 + 7 + 4 + 3 + 1 = 666.

It is not a de Polignac number, because 726427431 - 2⁶ = 726427367 is a prime.

It is a super-2 number, since 2×726427431² = 1055393625018519522, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (726427439) 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, 141091 + ... + 146148.

It is an arithmetic number, because the mean of its divisors is an integer number (87751820).

Almost surely, 2^726427431 is an apocalyptic number.

726427431 is a deficient number, since it is larger than the sum of its proper divisors (326594409).

726427431 is a wasteful number, since it uses less digits than its factorization.

726427431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287526 (or 287523 counting only the distinct ones).

The product of its digits is 56448, while the sum is 36.

The square root of 726427431 is about 26952.3177296499. The cubic root of 726427431 is about 898.9400818680.

The spelling of 726427431 in words is "seven hundred twenty-six million, four hundred twenty-seven thousand, four hundred thirty-one".