70718640 has 80 divisors (see below), whose sum is σ = 232136928. Its totient is φ = 17747968.

The previous prime is 70718633. The next prime is 70718663. The reversal of 70718640 is 4681707.

70718640 is nontrivially palindromic in base 11.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×70718640² = 10002252086899200, 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 15 ways as a sum of consecutive naturals, for example, 4587 + ... + 12746.

Almost surely, 2^70718640 is an apocalyptic number.

It is an amenable number.

70718640 is an abundant number, since it is smaller than the sum of its proper divisors (161418288).

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

70718640 is a wasteful number, since it uses less digits than its factorization.

70718640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17366 (or 17360 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 33.

The square root of 70718640 is about 8409.4375555087. The cubic root of 70718640 is about 413.5340740724.

The spelling of 70718640 in words is "seventy million, seven hundred eighteen thousand, six hundred forty".