28535629640 has 64 divisors (see below), whose sum is σ = 74472566400. Its totient is φ = 9637613568.

The previous prime is 28535629567. The next prime is 28535629691. The reversal of 28535629640 is 4692653582.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 741785 + ... + 779304.

It is an arithmetic number, because the mean of its divisors is an integer number (1163633850).

Almost surely, 2^28535629640 is an apocalyptic number.

28535629640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28535629640 is an abundant number, since it is smaller than the sum of its proper divisors (45936936760).

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

28535629640 is a wasteful number, since it uses less digits than its factorization.

28535629640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1521174 (or 1521170 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 50.

The spelling of 28535629640 in words is "twenty-eight billion, five hundred thirty-five million, six hundred twenty-nine thousand, six hundred forty".