70861636 has 24 divisors (see below), whose sum is σ = 127212120. Its totient is φ = 34524672.

The previous prime is 70861603. The next prime is 70861639. The reversal of 70861636 is 63616807.

It can be written as a sum of positive squares in 4 ways, for example, as 5089536 + 65772100 = 2256^2 + 8110^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 70861595 and 70861604.

It is not an unprimeable number, because it can be changed into a prime (70861639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32220 + ... + 34348.

It is an arithmetic number, because the mean of its divisors is an integer number (5300505).

Almost surely, 2^70861636 is an apocalyptic number.

It is an amenable number.

70861636 is a deficient number, since it is larger than the sum of its proper divisors (56350484).

70861636 is a wasteful number, since it uses less digits than its factorization.

70861636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343 (or 2341 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 70861636 is about 8417.9353763260. The cubic root of 70861636 is about 413.8126140548.

The spelling of 70861636 in words is "seventy million, eight hundred sixty-one thousand, six hundred thirty-six".