427921056 has 144 divisors (see below), whose sum is σ = 1275753024. Its totient is φ = 141087744.

The previous prime is 427921037. The next prime is 427921057. The reversal of 427921056 is 650129724.

It is a tau number, because it is divible by the number of its divisors (144).

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 427921056.

It is not an unprimeable number, because it can be changed into a prime (427921057) 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 23 ways as a sum of consecutive naturals, for example, 878445 + ... + 878931.

It is an arithmetic number, because the mean of its divisors is an integer number (8859396).

Almost surely, 2^427921056 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 427921056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (637876512).

427921056 is an abundant number, since it is smaller than the sum of its proper divisors (847831968).

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

427921056 is a wasteful number, since it uses less digits than its factorization.

427921056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 625 (or 605 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 427921056 is about 20686.2528264546. The cubic root of 427921056 is about 753.5658672520.

The spelling of 427921056 in words is "four hundred twenty-seven million, nine hundred twenty-one thousand, fifty-six".