70781676 has 144 divisors (see below), whose sum is σ = 208335456. Its totient is φ = 18579456.

The previous prime is 70781639. The next prime is 70781687. The reversal of 70781676 is 67618707.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an alternating number because its digits alternate between odd and even.

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 47 ways as a sum of consecutive naturals, for example, 729660 + ... + 729756.

It is an arithmetic number, because the mean of its divisors is an integer number (1446774).

Almost surely, 2^70781676 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70781676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104167728).

70781676 is an abundant number, since it is smaller than the sum of its proper divisors (137553780).

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

70781676 is a wasteful number, since it uses less digits than its factorization.

70781676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208 (or 199 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 42.

The square root of 70781676 is about 8413.1846526746. The cubic root of 70781676 is about 413.6569072816.

The spelling of 70781676 in words is "seventy million, seven hundred eighty-one thousand, six hundred seventy-six".