70987984 has 10 divisors (see below), whose sum is σ = 137539250. Its totient is φ = 35493984.

The previous prime is 70987981. The next prime is 70988011. The reversal of 70987984 is 48978907.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 53582400 + 17405584 = 7320^2 + 4172^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70987981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2218359 + ... + 2218390.

It is an arithmetic number, because the mean of its divisors is an integer number (13753925).

Almost surely, 2^70987984 is an apocalyptic number.

It is an amenable number.

70987984 is a deficient number, since it is larger than the sum of its proper divisors (66551266).

70987984 is a wasteful number, since it uses less digits than its factorization.

70987984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4436757 (or 4436751 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 70987984 is about 8425.4367245859. The cubic root of 70987984 is about 414.0584139689.

The spelling of 70987984 in words is "seventy million, nine hundred eighty-seven thousand, nine hundred eighty-four".