428783642 has 32 divisors (see below), whose sum is σ = 743140992. Its totient is φ = 181756224.

The previous prime is 428783603. The next prime is 428783651. The reversal of 428783642 is 246387824.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 428783593 and 428783602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 819593 + ... + 820115.

It is an arithmetic number, because the mean of its divisors is an integer number (23223156).

Almost surely, 2^428783642 is an apocalyptic number.

428783642 is a deficient number, since it is larger than the sum of its proper divisors (314357350).

428783642 is a wasteful number, since it uses less digits than its factorization.

428783642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062.

The product of its digits is 516096, while the sum is 44.

The square root of 428783642 is about 20707.0915871834. The cubic root of 428783642 is about 754.0718633060.

The spelling of 428783642 in words is "four hundred twenty-eight million, seven hundred eighty-three thousand, six hundred forty-two".