70881680 has 20 divisors (see below), whose sum is σ = 164800092. Its totient is φ = 28352640.

The previous prime is 70881641. The next prime is 70881689. The reversal of 70881680 is 8618807.

It can be written as a sum of positive squares in 2 ways, for example, as 41113744 + 29767936 = 6412^2 + 5456^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (70881689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 442931 + ... + 443090.

Almost surely, 2^70881680 is an apocalyptic number.

It is an amenable number.

70881680 is an abundant number, since it is smaller than the sum of its proper divisors (93918412).

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

70881680 is a wasteful number, since it uses less digits than its factorization.

70881680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 886034 (or 886028 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 70881680 is about 8419.1258453595. The cubic root of 70881680 is about 413.8516275397.

The spelling of 70881680 in words is "seventy million, eight hundred eighty-one thousand, six hundred eighty".