70686918 has 40 divisors (see below), whose sum is σ = 167714712. Its totient is φ = 22175424.

The previous prime is 70686887. The next prime is 70686923. The reversal of 70686918 is 81968607.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 10080 + ... + 15587.

Almost surely, 2^70686918 is an apocalyptic number.

70686918 is an abundant number, since it is smaller than the sum of its proper divisors (97027794).

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

70686918 is a wasteful number, since it uses less digits than its factorization.

70686918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25698 (or 25689 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 70686918 is about 8407.5512487287. The cubic root of 70686918 is about 413.4722323390.

The spelling of 70686918 in words is "seventy million, six hundred eighty-six thousand, nine hundred eighteen".