70072240 has 80 divisors (see below), whose sum is σ = 187612992. Its totient is φ = 23841792.

The previous prime is 70072229. The next prime is 70072279. The reversal of 70072240 is 4227007.

It is a tau number, because it is divible by the number of its divisors (80).

It is an unprimeable number.

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, 87522 + ... + 88318.

Almost surely, 2^70072240 is an apocalyptic number.

70072240 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70072240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93806496).

70072240 is an abundant number, since it is smaller than the sum of its proper divisors (117540752).

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

70072240 is a wasteful number, since it uses less digits than its factorization.

70072240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 974 (or 968 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 22.

The square root of 70072240 is about 8370.9163178233. The cubic root of 70072240 is about 412.2702534535.

Adding to 70072240 its reverse (4227007), we get a palindrome (74299247).

The spelling of 70072240 in words is "seventy million, seventy-two thousand, two hundred forty".