70730240 has 80 divisors (see below), whose sum is σ = 193862592. Its totient is φ = 24244224.

The previous prime is 70730213. The next prime is 70730243. The reversal of 70730240 is 4203707.

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

It is not an unprimeable number, because it can be changed into a prime (70730243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15947 + ... + 19893.

Almost surely, 2^70730240 is an apocalyptic number.

70730240 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 70730240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96931296).

70730240 is an abundant number, since it is smaller than the sum of its proper divisors (123132352).

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

70730240 is an equidigital number, since it uses as much as digits as its factorization.

70730240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3977 (or 3961 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 23.

The square root of 70730240 is about 8410.1272285263. The cubic root of 70730240 is about 413.5566835428.

Adding to 70730240 its reverse (4203707), we get a palindrome (74933947).

The spelling of 70730240 in words is "seventy million, seven hundred thirty thousand, two hundred forty".