428107890 has 64 divisors (see below), whose sum is σ = 1191803904. Its totient is φ = 96389568.

The previous prime is 428107793. The next prime is 428107891. The reversal of 428107890 is 98701824.

It is not an unprimeable number, because it can be changed into a prime (428107891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1144 + ... + 29283.

It is an arithmetic number, because the mean of its divisors is an integer number (18621936).

Almost surely, 2^428107890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428107890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (595901952).

428107890 is an abundant number, since it is smaller than the sum of its proper divisors (763696014).

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

428107890 is a wasteful number, since it uses less digits than its factorization.

428107890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30511.

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 428107890 is about 20690.7682312668. The cubic root of 428107890 is about 753.6755223998.

The spelling of 428107890 in words is "four hundred twenty-eight million, one hundred seven thousand, eight hundred ninety".