72070064 has 80 divisors (see below), whose sum is σ = 159096960. Its totient is φ = 31342080.

The previous prime is 72070057. The next prime is 72070067. The reversal of 72070064 is 46007027.

It is not an unprimeable number, because it can be changed into a prime (72070067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 673499 + ... + 673605.

It is an arithmetic number, because the mean of its divisors is an integer number (1988712).

Almost surely, 2^72070064 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 72070064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79548480).

72070064 is an abundant number, since it is smaller than the sum of its proper divisors (87026896).

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

72070064 is a wasteful number, since it uses less digits than its factorization.

72070064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258 (or 252 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 72070064 is about 8489.4089311330. The cubic root of 72070064 is about 416.1516643744.

The spelling of 72070064 in words is "seventy-two million, seventy thousand, sixty-four".