70639680 has 56 divisors (see below), whose sum is σ = 224284032. Its totient is φ = 18836992.

The previous prime is 70639651. The next prime is 70639687. The reversal of 70639680 is 8693607.

It is not an unprimeable number, because it can be changed into a prime (70639687) 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, 35832 + ... + 37751.

It is an arithmetic number, because the mean of its divisors is an integer number (4005072).

Almost surely, 2^70639680 is an apocalyptic number.

It is an amenable number.

70639680 is an abundant number, since it is smaller than the sum of its proper divisors (153644352).

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

70639680 is a wasteful number, since it uses less digits than its factorization.

70639680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73603 (or 73593 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 70639680 is about 8404.7415189285. The cubic root of 70639680 is about 413.3801080145.

The spelling of 70639680 in words is "seventy million, six hundred thirty-nine thousand, six hundred eighty".