428073222 has 32 divisors (see below), whose sum is σ = 870879744. Its totient is φ = 140256000.

The previous prime is 428073181. The next prime is 428073223. The reversal of 428073222 is 222370824.

It is a super-2 number, since 2×428073222² = 366493366786922568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 428073222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428073223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85447 + ... + 90317.

It is an arithmetic number, because the mean of its divisors is an integer number (27214992).

Almost surely, 2^428073222 is an apocalyptic number.

428073222 is an abundant number, since it is smaller than the sum of its proper divisors (442806522).

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

428073222 is a wasteful number, since it uses less digits than its factorization.

428073222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5124.

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 428073222 is about 20689.9304493756. The cubic root of 428073222 is about 753.6551777398.

The spelling of 428073222 in words is "four hundred twenty-eight million, seventy-three thousand, two hundred twenty-two".