70507440 has 60 divisors (see below), whose sum is σ = 236789904. Its totient is φ = 18801792.

The previous prime is 70507427. The next prime is 70507447. The reversal of 70507440 is 4470507.

It is a tau number, because it is divible by the number of its divisors (60).

It is not an unprimeable number, because it can be changed into a prime (70507447) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48244 + ... + 49683.

Almost surely, 2^70507440 is an apocalyptic number.

It is an amenable number.

70507440 is an abundant number, since it is smaller than the sum of its proper divisors (166282464).

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

70507440 is a wasteful number, since it uses less digits than its factorization.

70507440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97946 (or 97937 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 27.

The square root of 70507440 is about 8396.8708457377. The cubic root of 70507440 is about 413.1219927792.

Adding to 70507440 its reverse (4470507), we get a palindrome (74977947).

The spelling of 70507440 in words is "seventy million, five hundred seven thousand, four hundred forty".