28986021935 has 32 divisors (see below), whose sum is σ = 37747261440. Its totient is φ = 21240903168.

The previous prime is 28986021917. The next prime is 28986021947. The reversal of 28986021935 is 53912068982.

It is a cyclic number.

It is not a de Polignac number, because 28986021935 - 2⁸ = 28986021679 is a prime.

It is a super-2 number, since 2×28986021935² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4715474 + ... + 4721616.

It is an arithmetic number, because the mean of its divisors is an integer number (1179601920).

Almost surely, 2^28986021935 is an apocalyptic number.

28986021935 is a deficient number, since it is larger than the sum of its proper divisors (8761239505).

28986021935 is a wasteful number, since it uses less digits than its factorization.

28986021935 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6707.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 28986021935 in words is "twenty-eight billion, nine hundred eighty-six million, twenty-one thousand, nine hundred thirty-five".