428008320 has 512 divisors, whose sum is σ = 1692057600. Its totient is φ = 101744640.

The previous prime is 428008291. The next prime is 428008327. The reversal of 428008320 is 23800824.

It is a super-2 number, since 2×428008320² = 366382243978444800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428008327) 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 63 ways as a sum of consecutive naturals, for example, 9106537 + ... + 9106583.

It is an arithmetic number, because the mean of its divisors is an integer number (3304800).

Almost surely, 2^428008320 is an apocalyptic number.

428008320 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 428008320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846028800).

428008320 is an abundant number, since it is smaller than the sum of its proper divisors (1264049280).

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

428008320 is a wasteful number, since it uses less digits than its factorization.

428008320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123 (or 105 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 428008320 is about 20688.3619457897. The cubic root of 428008320 is about 753.6170875269.

The spelling of 428008320 in words is "four hundred twenty-eight million, eight thousand, three hundred twenty".