70638986 has 8 divisors (see below), whose sum is σ = 115591104. Its totient is φ = 32108620.

The previous prime is 70638973. The next prime is 70638991. The reversal of 70638986 is 68983607.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 70638986.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1605410 + ... + 1605453.

It is an arithmetic number, because the mean of its divisors is an integer number (14448888).

Almost surely, 2^70638986 is an apocalyptic number.

70638986 is a deficient number, since it is larger than the sum of its proper divisors (44952118).

70638986 is a wasteful number, since it uses less digits than its factorization.

70638986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3210876.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 70638986 is about 8404.7002326079. The cubic root of 70638986 is about 413.3787542582.

The spelling of 70638986 in words is "seventy million, six hundred thirty-eight thousand, nine hundred eighty-six".