426215556 has 144 divisors (see below), whose sum is σ = 1197600768. Its totient is φ = 127008000.

The previous prime is 426215549. The next prime is 426215597. The reversal of 426215556 is 655512624.

426215556 is a `hidden beast` number, since 42 + 62 + 1 + 5 + 556 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 426215556.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3355965 + ... + 3356091.

It is an arithmetic number, because the mean of its divisors is an integer number (8316672).

Almost surely, 2^426215556 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 426215556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (598800384).

426215556 is an abundant number, since it is smaller than the sum of its proper divisors (771385212).

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

426215556 is a wasteful number, since it uses less digits than its factorization.

426215556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 317 counting only the distinct ones).

The product of its digits is 72000, while the sum is 36.

The square root of 426215556 is about 20644.9886413144. The cubic root of 426215556 is about 752.5634099242.

The spelling of 426215556 in words is "four hundred twenty-six million, two hundred fifteen thousand, five hundred fifty-six".