428640941532 has 24 divisors (see below), whose sum is σ = 1006785791872. Its totient is φ = 141934086000.

The previous prime is 428640941513. The next prime is 428640941539. The reversal of 428640941532 is 235149046824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428640941539) 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, 118276594 + ... + 118280217.

Almost surely, 2^428640941532 is an apocalyptic number.

It is an amenable number.

428640941532 is an abundant number, since it is smaller than the sum of its proper divisors (578144850340).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428640941532 is a wasteful number, since it uses less digits than its factorization.

428640941532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236556969 (or 236556967 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 428640941532 in words is "four hundred twenty-eight billion, six hundred forty million, nine hundred forty-one thousand, five hundred thirty-two".