28696665371 has 16 divisors (see below), whose sum is σ = 32968066560. Its totient is φ = 24703613280.

The previous prime is 28696665353. The next prime is 28696665419. The reversal of 28696665371 is 17356669682.

It is a cyclic number.

It is not a de Polignac number, because 28696665371 - 2¹⁴ = 28696648987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28696665371.

It is not an unprimeable number, because it can be changed into a prime (28696665301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447965 + ... + 508001.

It is an arithmetic number, because the mean of its divisors is an integer number (2060504160).

Almost surely, 2^28696665371 is an apocalyptic number.

28696665371 is a deficient number, since it is larger than the sum of its proper divisors (4271401189).

28696665371 is a wasteful number, since it uses less digits than its factorization.

28696665371 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62354.

The product of its digits is 19595520, while the sum is 59.

The spelling of 28696665371 in words is "twenty-eight billion, six hundred ninety-six million, six hundred sixty-five thousand, three hundred seventy-one".