428709540 has 192 divisors, whose sum is σ = 1491517440. Its totient is φ = 89786880.

The previous prime is 428709511. The next prime is 428709563. The reversal of 428709540 is 45907824.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 246514 + ... + 248246.

It is an arithmetic number, because the mean of its divisors is an integer number (7768320).

Almost surely, 2^428709540 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428709540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (745758720).

428709540 is an abundant number, since it is smaller than the sum of its proper divisors (1062807900).

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

428709540 is a wasteful number, since it uses less digits than its factorization.

428709540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1802 (or 1800 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 428709540 is about 20705.3022194799. The cubic root of 428709540 is about 754.0284214650.

The spelling of 428709540 in words is "four hundred twenty-eight million, seven hundred nine thousand, five hundred forty".