28502213768 has 36 divisors (see below), whose sum is σ = 62174109735. Its totient is φ = 12213801936.

The previous prime is 28502213767. The next prime is 28502213819. The reversal of 28502213768 is 86731220582.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 14251106884 + 14251106884 = 119378^2 + 119378^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=119378.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28502213767) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3338321 + ... + 3346847.

Almost surely, 2^28502213768 is an apocalyptic number.

28502213768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28502213768 is an abundant number, since it is smaller than the sum of its proper divisors (33671895967).

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

28502213768 is an frugal number, since it uses more digits than its factorization.

28502213768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17074 (or 8536 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 44.

The spelling of 28502213768 in words is "twenty-eight billion, five hundred two million, two hundred thirteen thousand, seven hundred sixty-eight".