70440064 has 32 divisors (see below), whose sum is σ = 141185340. Its totient is φ = 35005440.

The previous prime is 70440059. The next prime is 70440067. The reversal of 70440064 is 46004407.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 70425664 + 14400 = 8392^2 + 120^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (70440067) 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, 20554 + ... + 23734.

Almost surely, 2^70440064 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 70440064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70592670).

70440064 is an abundant number, since it is smaller than the sum of its proper divisors (70745276).

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

70440064 is a wasteful number, since it uses less digits than its factorization.

70440064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3368 (or 3356 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 70440064 is about 8392.8579161094. The cubic root of 70440064 is about 412.9903594925.

The spelling of 70440064 in words is "seventy million, four hundred forty thousand, sixty-four".