70005998 has 16 divisors (see below), whose sum is σ = 111329664. Its totient is φ = 32957280.

The previous prime is 70005989. The next prime is 70006003. The reversal of 70005998 is 89950007.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12965 + ... + 17552.

It is an arithmetic number, because the mean of its divisors is an integer number (6958104).

Almost surely, 2^70005998 is an apocalyptic number.

70005998 is a deficient number, since it is larger than the sum of its proper divisors (41323666).

70005998 is a wasteful number, since it uses less digits than its factorization.

70005998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30587.

The product of its (nonzero) digits is 22680, while the sum is 38.

The square root of 70005998 is about 8366.9587067225. The cubic root of 70005998 is about 412.1403008205.

The spelling of 70005998 in words is "seventy million, five thousand, nine hundred ninety-eight".