70447388440 has 128 divisors (see below), whose sum is σ = 186327086400. Its totient is φ = 23632773120.

The previous prime is 70447388419. The next prime is 70447388441. The reversal of 70447388440 is 4488374407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70447388441) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15607624 + ... + 15612136.

Almost surely, 2^70447388440 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 70447388440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93163543200).

70447388440 is an abundant number, since it is smaller than the sum of its proper divisors (115879697960).

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

70447388440 is a wasteful number, since it uses less digits than its factorization.

70447388440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7277 (or 7273 counting only the distinct ones).

The product of its (nonzero) digits is 2408448, while the sum is 49.

The spelling of 70447388440 in words is "seventy billion, four hundred forty-seven million, three hundred eighty-eight thousand, four hundred forty".