428375064 has 128 divisors (see below), whose sum is σ = 1225728000. Its totient is φ = 123669504.

The previous prime is 428375041. The next prime is 428375089. The reversal of 428375064 is 460573824.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

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, 752572 + ... + 753140.

It is an arithmetic number, because the mean of its divisors is an integer number (9576000).

Almost surely, 2^428375064 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 428375064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (612864000).

428375064 is an abundant number, since it is smaller than the sum of its proper divisors (797352936).

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

428375064 is a wasteful number, since it uses less digits than its factorization.

428375064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 39.

The square root of 428375064 is about 20697.2235819204. The cubic root of 428375064 is about 753.8322746534.

The spelling of 428375064 in words is "four hundred twenty-eight million, three hundred seventy-five thousand, sixty-four".