70281216 has 192 divisors, whose sum is σ = 220147200. Its totient is φ = 22118400.

The previous prime is 70281187. The next prime is 70281223. The reversal of 70281216 is 61218207.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 70281216.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1714156 + ... + 1714196.

It is an arithmetic number, because the mean of its divisors is an integer number (1146600).

Almost surely, 2^70281216 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 70281216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110073600).

70281216 is an abundant number, since it is smaller than the sum of its proper divisors (149865984).

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

70281216 is a wasteful number, since it uses less digits than its factorization.

70281216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 70281216 is about 8383.3892907344. The cubic root of 70281216 is about 412.6796837025.

It can be divided in two parts, 702 and 81216, that added together give a palindrome (81918).

The spelling of 70281216 in words is "seventy million, two hundred eighty-one thousand, two hundred sixteen".