28696935840 has 48 divisors (see below), whose sum is σ = 90395349408. Its totient is φ = 7652516096.

The previous prime is 28696935829. The next prime is 28696935881. The reversal of 28696935840 is 4853969682.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (60).

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 7 ways as a sum of consecutive naturals, for example, 29892162 + ... + 29893121.

It is an arithmetic number, because the mean of its divisors is an integer number (1883236446).

Almost surely, 2^28696935840 is an apocalyptic number.

28696935840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28696935840 is an abundant number, since it is smaller than the sum of its proper divisors (61698413568).

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

28696935840 is a wasteful number, since it uses less digits than its factorization.

28696935840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59785301 (or 59785293 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 60.

The spelling of 28696935840 in words is "twenty-eight billion, six hundred ninety-six million, nine hundred thirty-five thousand, eight hundred forty".