70986820 has 12 divisors (see below), whose sum is σ = 149072364. Its totient is φ = 28394720.

The previous prime is 70986803. The next prime is 70986833. The reversal of 70986820 is 2868907.

It can be written as a sum of positive squares in 2 ways, for example, as 49308484 + 21678336 = 7022^2 + 4656^2 .

It is a super-2 number, since 2×70986820² = 10078257227424800, which contains 22 as substring.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1774651 + ... + 1774690.

It is an arithmetic number, because the mean of its divisors is an integer number (12422697).

Almost surely, 2^70986820 is an apocalyptic number.

It is an amenable number.

70986820 is an abundant number, since it is smaller than the sum of its proper divisors (78085544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70986820 is a wasteful number, since it uses less digits than its factorization.

70986820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549350 (or 3549348 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 70986820 is about 8425.3676477647. The cubic root of 70986820 is about 414.0561508318.

The spelling of 70986820 in words is "seventy million, nine hundred eighty-six thousand, eight hundred twenty".