428047988 has 24 divisors (see below), whose sum is σ = 766036992. Its totient is φ = 209192544.

The previous prime is 428047987. The next prime is 428047993. The reversal of 428047988 is 889740824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428047987) 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, 272381 + ... + 273947.

It is an arithmetic number, because the mean of its divisors is an integer number (31918208).

Almost surely, 2^428047988 is an apocalyptic number.

It is an amenable number.

428047988 is a deficient number, since it is larger than the sum of its proper divisors (337989004).

428047988 is a wasteful number, since it uses less digits than its factorization.

428047988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071 (or 3069 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 50.

The square root of 428047988 is about 20689.3206268355. The cubic root of 428047988 is about 753.6403686624.

The spelling of 428047988 in words is "four hundred twenty-eight million, forty-seven thousand, nine hundred eighty-eight".