203428537928 has 64 divisors (see below), whose sum is σ = 503520624000. Its totient is φ = 74595640320.

The previous prime is 203428537883. The next prime is 203428537987. The reversal of 203428537928 is 829735824302.

It is a happy number.

It is a super-3 number, since 3×203428537928³ (a number of 35 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 203428537928.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9702503 + ... + 9723446.

It is an arithmetic number, because the mean of its divisors is an integer number (7867509750).

Almost surely, 2^203428537928 is an apocalyptic number.

203428537928 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

203428537928 is an abundant number, since it is smaller than the sum of its proper divisors (300092086072).

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

203428537928 is a wasteful number, since it uses less digits than its factorization.

203428537928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19425990 (or 19425986 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 53.

The spelling of 203428537928 in words is "two hundred three billion, four hundred twenty-eight million, five hundred thirty-seven thousand, nine hundred twenty-eight".