428578540 has 24 divisors (see below), whose sum is σ = 969247440. Its totient is φ = 158244288.

The previous prime is 428578531. The next prime is 428578543. The reversal of 428578540 is 45875824.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (428578543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 823930 + ... + 824449.

It is an arithmetic number, because the mean of its divisors is an integer number (40385310).

Almost surely, 2^428578540 is an apocalyptic number.

It is an amenable number.

428578540 is an abundant number, since it is smaller than the sum of its proper divisors (540668900).

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

428578540 is a wasteful number, since it uses less digits than its factorization.

428578540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1648401 (or 1648399 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 43.

The square root of 428578540 is about 20702.1385368758. The cubic root of 428578540 is about 753.9516112732.

The spelling of 428578540 in words is "four hundred twenty-eight million, five hundred seventy-eight thousand, five hundred forty".