70639616 has 28 divisors (see below), whose sum is σ = 141286992. Its totient is φ = 35315712.

The previous prime is 70639609. The next prime is 70639633. The reversal of 70639616 is 61693607.

It is a self number, because there is not a number n which added to its sum of digits gives 70639616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3881 + ... + 12503.

It is an arithmetic number, because the mean of its divisors is an integer number (5045964).

Almost surely, 2^70639616 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 70639616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70643496).

70639616 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

70639616 is an frugal number, since it uses more digits than its factorization.

70639616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8649 (or 8625 counting only the distinct ones).

The product of its (nonzero) digits is 40824, while the sum is 38.

The square root of 70639616 is about 8404.7377115529. The cubic root of 70639616 is about 413.3799831728.

The spelling of 70639616 in words is "seventy million, six hundred thirty-nine thousand, six hundred sixteen".