428493280 has 96 divisors (see below), whose sum is σ = 1053870048. Its totient is φ = 164505600.

The previous prime is 428493277. The next prime is 428493293. The reversal of 428493280 is 82394824.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419170 + ... + 420190.

It is an arithmetic number, because the mean of its divisors is an integer number (10977813).

Almost surely, 2^428493280 is an apocalyptic number.

428493280 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 428493280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526935024).

428493280 is an abundant number, since it is smaller than the sum of its proper divisors (625376768).

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

428493280 is a wasteful number, since it uses less digits than its factorization.

428493280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140 (or 1132 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 428493280 is about 20700.0792269015. The cubic root of 428493280 is about 753.9016117425.

The spelling of 428493280 in words is "four hundred twenty-eight million, four hundred ninety-three thousand, two hundred eighty".