428134920 has 32 divisors (see below), whose sum is σ = 1284405120. Its totient is φ = 114169280.

The previous prime is 428134913. The next prime is 428134921. The reversal of 428134920 is 29431824.

It is not an unprimeable number, because it can be changed into a prime (428134921) 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, 1783776 + ... + 1784015.

It is an arithmetic number, because the mean of its divisors is an integer number (40137660).

Almost surely, 2^428134920 is an apocalyptic number.

428134920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

428134920 is an abundant number, since it is smaller than the sum of its proper divisors (856270200).

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

428134920 is a wasteful number, since it uses less digits than its factorization.

428134920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3567805 (or 3567801 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 428134920 is about 20691.4214108166. The cubic root of 428134920 is about 753.6913839938.

The spelling of 428134920 in words is "four hundred twenty-eight million, one hundred thirty-four thousand, nine hundred twenty".