420987528 has 48 divisors (see below), whose sum is σ = 1227883020. Its totient is φ = 129534336.

The previous prime is 420987487. The next prime is 420987529. The reversal of 420987528 is 825789024.

420987528 is a `hidden beast` number, since 42 + 0 + 9 + 87 + 528 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 409576644 + 11410884 = 20238^2 + 3378^2 .

It is not an unprimeable number, because it can be changed into a prime (420987529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223951 + ... + 225822.

Almost surely, 2^420987528 is an apocalyptic number.

It is an amenable number.

420987528 is an abundant number, since it is smaller than the sum of its proper divisors (806895492).

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

420987528 is a wasteful number, since it uses less digits than its factorization.

420987528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449798 (or 449791 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 45.

The square root of 420987528 is about 20517.9806023887. The cubic root of 420987528 is about 749.4737214609.

The spelling of 420987528 in words is "four hundred twenty million, nine hundred eighty-seven thousand, five hundred twenty-eight".