426221520 has 80 divisors (see below), whose sum is σ = 1339949952. Its totient is φ = 112053760.

The previous prime is 426221513. The next prime is 426221557. The reversal of 426221520 is 25122624.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×426221520² = 363329568222220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4534 + ... + 29546.

Almost surely, 2^426221520 is an apocalyptic number.

426221520 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 426221520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (669974976).

426221520 is an abundant number, since it is smaller than the sum of its proper divisors (913728432).

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

426221520 is a wasteful number, since it uses less digits than its factorization.

426221520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25100 (or 25094 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 426221520 is about 20645.1330826420. The cubic root of 426221520 is about 752.5669200943.

The spelling of 426221520 in words is "four hundred twenty-six million, two hundred twenty-one thousand, five hundred twenty".