428690020 has 96 divisors (see below), whose sum is σ = 1053150336. Its totient is φ = 144844800.

The previous prime is 428690011. The next prime is 428690051. The reversal of 428690020 is 20096824.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 309730 + ... + 311110.

It is an arithmetic number, because the mean of its divisors is an integer number (10970316).

Almost surely, 2^428690020 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 428690020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (526575168).

428690020 is an abundant number, since it is smaller than the sum of its proper divisors (624460316).

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

428690020 is a wasteful number, since it uses less digits than its factorization.

428690020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1499 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 428690020 is about 20704.8308372708. The cubic root of 428690020 is about 754.0169771522.

The spelling of 428690020 in words is "four hundred twenty-eight million, six hundred ninety thousand, twenty".