426818643 has 16 divisors (see below), whose sum is σ = 618855840. Its totient is φ = 260568576.

The previous prime is 426818629. The next prime is 426818653. The reversal of 426818643 is 346818624.

It is not a de Polignac number, because 426818643 - 2⁵ = 426818611 is a prime.

It is a super-2 number, since 2×426818643² = 364348308024722898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 426818595 and 426818604.

It is not an unprimeable number, because it can be changed into a prime (426818653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111208 + ... + 114981.

It is an arithmetic number, because the mean of its divisors is an integer number (38678490).

Almost surely, 2^426818643 is an apocalyptic number.

426818643 is a deficient number, since it is larger than the sum of its proper divisors (192037197).

426818643 is a wasteful number, since it uses less digits than its factorization.

426818643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226246.

The product of its digits is 221184, while the sum is 42.

The square root of 426818643 is about 20659.5896135427. The cubic root of 426818643 is about 752.9181969974.

The spelling of 426818643 in words is "four hundred twenty-six million, eight hundred eighteen thousand, six hundred forty-three".