428254840 has 128 divisors (see below), whose sum is σ = 1085918400. Its totient is φ = 150958080.

The previous prime is 428254829. The next prime is 428254843. The reversal of 428254840 is 48452824.

It is a self number, because there is not a number n which added to its sum of digits gives 428254840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428254843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1129771 + ... + 1130149.

Almost surely, 2^428254840 is an apocalyptic number.

428254840 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 428254840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (542959200).

428254840 is an abundant number, since it is smaller than the sum of its proper divisors (657663560).

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

428254840 is a wasteful number, since it uses less digits than its factorization.

428254840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 81920, while the sum is 37.

The square root of 428254840 is about 20694.3190272113. The cubic root of 428254840 is about 753.7617467301.

The spelling of 428254840 in words is "four hundred twenty-eight million, two hundred fifty-four thousand, eight hundred forty".