428705250 has 64 divisors (see below), whose sum is σ = 1073105280. Its totient is φ = 113995200.

The previous prime is 428705243. The next prime is 428705267. The reversal of 428705250 is 52507824.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 381189 + ... + 382311.

It is an arithmetic number, because the mean of its divisors is an integer number (16767270).

Almost surely, 2^428705250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428705250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536552640).

428705250 is an abundant number, since it is smaller than the sum of its proper divisors (644400030).

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

428705250 is a wasteful number, since it uses less digits than its factorization.

428705250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652 (or 1642 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 33.

The square root of 428705250 is about 20705.1986225682. The cubic root of 428705250 is about 754.0259063256.

The spelling of 428705250 in words is "four hundred twenty-eight million, seven hundred five thousand, two hundred fifty".