428787444 has 12 divisors (see below), whose sum is σ = 1000504064. Its totient is φ = 142929144.

The previous prime is 428787419. The next prime is 428787509. The reversal of 428787444 is 444787824.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 428787393 and 428787402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17866132 + ... + 17866155.

Almost surely, 2^428787444 is an apocalyptic number.

It is an amenable number.

428787444 is an abundant number, since it is smaller than the sum of its proper divisors (571716620).

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

428787444 is a wasteful number, since it uses less digits than its factorization.

428787444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35732294 (or 35732292 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 48.

The square root of 428787444 is about 20707.1833912775. The cubic root of 428787444 is about 754.0740920701.

The spelling of 428787444 in words is "four hundred twenty-eight million, seven hundred eighty-seven thousand, four hundred forty-four".