33898856987 has 36 divisors (see below), whose sum is σ = 37907475840. Its totient is φ = 30271772160.

The previous prime is 33898856939. The next prime is 33898856989. The reversal of 33898856987 is 78965889833.

It is not a de Polignac number, because 33898856987 - 2¹² = 33898852891 is a prime.

It is a super-2 number, since 2×33898856987² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33898856989) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 31185158 + ... + 31186244.

It is an arithmetic number, because the mean of its divisors is an integer number (1052985440).

Almost surely, 2^33898856987 is an apocalyptic number.

33898856987 is a deficient number, since it is larger than the sum of its proper divisors (4008618853).

33898856987 is a wasteful number, since it uses less digits than its factorization.

33898856987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272 (or 1194 counting only the distinct ones).

The product of its digits is 627056640, while the sum is 74.

The spelling of 33898856987 in words is "thirty-three billion, eight hundred ninety-eight million, eight hundred fifty-six thousand, nine hundred eighty-seven".