428551344 has 160 divisors (see below), whose sum is σ = 1336789440. Its totient is φ = 130664448.

The previous prime is 428551337. The next prime is 428551367. The reversal of 428551344 is 443155824.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 428551299 and 428551308.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 769114 + ... + 769670.

It is an arithmetic number, because the mean of its divisors is an integer number (8354934).

Almost surely, 2^428551344 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 428551344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (668394720).

428551344 is an abundant number, since it is smaller than the sum of its proper divisors (908238096).

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

428551344 is a wasteful number, since it uses less digits than its factorization.

428551344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 724 (or 712 counting only the distinct ones).

The product of its digits is 76800, while the sum is 36.

The square root of 428551344 is about 20701.4816861016. The cubic root of 428551344 is about 753.9356632809.

The spelling of 428551344 in words is "four hundred twenty-eight million, five hundred fifty-one thousand, three hundred forty-four".