428803988 has 24 divisors (see below), whose sum is σ = 795578112. Its totient is φ = 201528704.

The previous prime is 428803981. The next prime is 428803993. The reversal of 428803988 is 889308824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428803981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55031 + ... + 62337.

It is an arithmetic number, because the mean of its divisors is an integer number (33149088).

Almost surely, 2^428803988 is an apocalyptic number.

It is an amenable number.

428803988 is a deficient number, since it is larger than the sum of its proper divisors (366774124).

428803988 is a wasteful number, since it uses less digits than its factorization.

428803988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8191 (or 8189 counting only the distinct ones).

The product of its (nonzero) digits is 884736, while the sum is 50.

The square root of 428803988 is about 20707.5828623236. The cubic root of 428803988 is about 754.0837901474.

The spelling of 428803988 in words is "four hundred twenty-eight million, eight hundred three thousand, nine hundred eighty-eight".