426778749 has 12 divisors (see below), whose sum is σ = 622444576. Its totient is φ = 281756232.

The previous prime is 426778733. The next prime is 426778771. The reversal of 426778749 is 947877624.

It is not a de Polignac number, because 426778749 - 2⁴ = 426778733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 426778695 and 426778704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426778249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229267 + ... + 231120.

Almost surely, 2^426778749 is an apocalyptic number.

It is an amenable number.

426778749 is a deficient number, since it is larger than the sum of its proper divisors (195665827).

426778749 is a wasteful number, since it uses less digits than its factorization.

426778749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460496 (or 460493 counting only the distinct ones).

The product of its digits is 4741632, while the sum is 54.

The square root of 426778749 is about 20658.6240829345. The cubic root of 426778749 is about 752.8947382795.

The spelling of 426778749 in words is "four hundred twenty-six million, seven hundred seventy-eight thousand, seven hundred forty-nine".