426444651240 has 128 divisors (see below), whose sum is σ = 1296098496000. Its totient is φ = 112229664768.

The previous prime is 426444651233. The next prime is 426444651287. The reversal of 426444651240 is 42156444624.

It is a junction number, because it is equal to n+sod(n) for n = 426444651192 and 426444651201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 24800566 + ... + 24817754.

It is an arithmetic number, because the mean of its divisors is an integer number (10125769500).

Almost surely, 2^426444651240 is an apocalyptic number.

426444651240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 426444651240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648049248000).

426444651240 is an abundant number, since it is smaller than the sum of its proper divisors (869653844760).

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

426444651240 is a wasteful number, since it uses less digits than its factorization.

426444651240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19899 (or 19895 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 42.

The spelling of 426444651240 in words is "four hundred twenty-six billion, four hundred forty-four million, six hundred fifty-one thousand, two hundred forty".