70086636 has 18 divisors (see below), whose sum is σ = 177163532. Its totient is φ = 23362200.

The previous prime is 70086619. The next prime is 70086637. The reversal of 70086636 is 63668007.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1946851 = 70086636 / (7 + 0 + 0 + 8 + 6 + 6 + 3 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 70086636.

It is not an unprimeable number, because it can be changed into a prime (70086637) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 973390 + ... + 973461.

Almost surely, 2^70086636 is an apocalyptic number.

It is an amenable number.

70086636 is an abundant number, since it is smaller than the sum of its proper divisors (107076896).

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

70086636 is a wasteful number, since it uses less digits than its factorization.

70086636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946861 (or 1946856 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 70086636 is about 8371.7761556315. The cubic root of 70086636 is about 412.2984844913.

The spelling of 70086636 in words is "seventy million, eighty-six thousand, six hundred thirty-six".