426868820 has 96 divisors (see below), whose sum is σ = 1083801600. Its totient is φ = 137960064.

The previous prime is 426868817. The next prime is 426868823. The reversal of 426868820 is 28868624.

It is an interprime number because it is at equal distance from previous prime (426868817) and next prime (426868823).

It is a super-3 number, since 3×426868820³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426868823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1018571 + ... + 1018989.

It is an arithmetic number, because the mean of its divisors is an integer number (11289600).

Almost surely, 2^426868820 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426868820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541900800).

426868820 is an abundant number, since it is smaller than the sum of its proper divisors (656932780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

426868820 is a wasteful number, since it uses less digits than its factorization.

426868820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 835 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 426868820 is about 20660.8039533799. The cubic root of 426868820 is about 752.9477003135.

It can be divided in two parts, 42686 and 8820, that multiplied together give a triangular number (376490520 = T₂₇₄₄₀).

The spelling of 426868820 in words is "four hundred twenty-six million, eight hundred sixty-eight thousand, eight hundred twenty".