28954509668 has 12 divisors (see below), whose sum is σ = 57909019392. Its totient is φ = 12409075560.

The previous prime is 28954509653. The next prime is 28954509691. The reversal of 28954509668 is 86690545982.

28954509668 is an admirable number.

It is a super-2 number, since 2×28954509668² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28954509668.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517044788 + ... + 517044843.

It is an arithmetic number, because the mean of its divisors is an integer number (4825751616).

Almost surely, 2^28954509668 is an apocalyptic number.

28954509668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28954509668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28954509668 is a wasteful number, since it uses less digits than its factorization.

28954509668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1034089642 (or 1034089640 counting only the distinct ones).

The product of its (nonzero) digits is 37324800, while the sum is 62.

The spelling of 28954509668 in words is "twenty-eight billion, nine hundred fifty-four million, five hundred nine thousand, six hundred sixty-eight".