70002720 has 144 divisors (see below), whose sum is σ = 241120152. Its totient is φ = 18493440.

The previous prime is 70002697. The next prime is 70002721. The reversal of 70002720 is 2720007.

It can be written as a sum of positive squares in 4 ways, for example, as 68757264 + 1245456 = 8292^2 + 1116^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 70002693 and 70002702.

It is not an unprimeable number, because it can be changed into a prime (70002721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 248980 + ... + 249260.

Almost surely, 2^70002720 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 70002720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120560076).

70002720 is an abundant number, since it is smaller than the sum of its proper divisors (171117432).

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

70002720 is a wasteful number, since it uses less digits than its factorization.

70002720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475 (or 464 counting only the distinct ones).

The product of its (nonzero) digits is 196, while the sum is 18.

The square root of 70002720 is about 8366.7628148526. The cubic root of 70002720 is about 412.1338679574.

Adding to 70002720 its reverse (2720007), we get a palindrome (72722727).

The spelling of 70002720 in words is "seventy million, two thousand, seven hundred twenty".