428121532 has 24 divisors (see below), whose sum is σ = 777093632. Its totient is φ = 206161200.

The previous prime is 428121521. The next prime is 428121559. The reversal of 428121532 is 235121824.

It is a self number, because there is not a number n which added to its sum of digits gives 428121532.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17983 + ... + 34345.

Almost surely, 2^428121532 is an apocalyptic number.

It is an amenable number.

428121532 is a deficient number, since it is larger than the sum of its proper divisors (348972100).

428121532 is a wasteful number, since it uses less digits than its factorization.

428121532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16609 (or 16607 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 428121532 is about 20691.0978925721. The cubic root of 428121532 is about 753.6835278057.

It can be divided in two parts, 42812 and 1532, that added together give a palindrome (44344).

The spelling of 428121532 in words is "four hundred twenty-eight million, one hundred twenty-one thousand, five hundred thirty-two".