428023432 has 16 divisors (see below), whose sum is σ = 802805760. Its totient is φ = 213941904.

The previous prime is 428023423. The next prime is 428023439. The reversal of 428023432 is 234320824.

It is a self number, because there is not a number n which added to its sum of digits gives 428023432.

It is not an unprimeable number, because it can be changed into a prime (428023439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24993 + ... + 38479.

It is an arithmetic number, because the mean of its divisors is an integer number (50175360).

Almost surely, 2^428023432 is an apocalyptic number.

It is an amenable number.

428023432 is a deficient number, since it is larger than the sum of its proper divisors (374782328).

428023432 is a wasteful number, since it uses less digits than its factorization.

428023432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17460 (or 17456 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

The square root of 428023432 is about 20688.7271720616. The cubic root of 428023432 is about 753.6259569241.

The spelling of 428023432 in words is "four hundred twenty-eight million, twenty-three thousand, four hundred thirty-two".