28653641940 has 96 divisors (see below), whose sum is σ = 100027275264. Its totient is φ = 5954002560.

The previous prime is 28653641897. The next prime is 28653641953. The reversal of 28653641940 is 4914635682.

It is a self number, because there is not a number n which added to its sum of digits gives 28653641940.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3096424 + ... + 3105663.

It is an arithmetic number, because the mean of its divisors is an integer number (1041950784).

Almost surely, 2^28653641940 is an apocalyptic number.

28653641940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28653641940 is an abundant number, since it is smaller than the sum of its proper divisors (71373633324).

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

28653641940 is a wasteful number, since it uses less digits than its factorization.

28653641940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6202117 (or 6202115 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 48.

The spelling of 28653641940 in words is "twenty-eight billion, six hundred fifty-three million, six hundred forty-one thousand, nine hundred forty".