428764446 has 144 divisors (see below), whose sum is σ = 1103431680. Its totient is φ = 119266560.

The previous prime is 428764439. The next prime is 428764447. The reversal of 428764446 is 644467824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428764447) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3376035 + ... + 3376161.

It is an arithmetic number, because the mean of its divisors is an integer number (7662720).

Almost surely, 2^428764446 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 428764446, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (551715840).

428764446 is an abundant number, since it is smaller than the sum of its proper divisors (674667234).

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

428764446 is a wasteful number, since it uses less digits than its factorization.

428764446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239 (or 219 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 45.

The square root of 428764446 is about 20706.6280692922. The cubic root of 428764446 is about 754.0606102497.

The spelling of 428764446 in words is "four hundred twenty-eight million, seven hundred sixty-four thousand, four hundred forty-six".