426605556 has 96 divisors (see below), whose sum is σ = 1136611840. Its totient is φ = 123451776.

The previous prime is 426605521. The next prime is 426605563. The reversal of 426605556 is 655506624.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 482691 + ... + 483573.

Almost surely, 2^426605556 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 426605556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (568305920).

426605556 is an abundant number, since it is smaller than the sum of its proper divisors (710006284).

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

426605556 is a wasteful number, since it uses less digits than its factorization.

426605556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085 (or 1083 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 39.

The square root of 426605556 is about 20654.4318730872. The cubic root of 426605556 is about 752.7928793018.

The spelling of 426605556 in words is "four hundred twenty-six million, six hundred five thousand, five hundred fifty-six".