70043440 has 20 divisors (see below), whose sum is σ = 162851184. Its totient is φ = 28017344.

The previous prime is 70043429. The next prime is 70043447. The reversal of 70043440 is 4434007.

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (70043447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437692 + ... + 437851.

Almost surely, 2^70043440 is an apocalyptic number.

It is an amenable number.

70043440 is an abundant number, since it is smaller than the sum of its proper divisors (92807744).

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

70043440 is a wasteful number, since it uses less digits than its factorization.

70043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875556 (or 875550 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 70043440 is about 8369.1958992486. The cubic root of 70043440 is about 412.2137640822.

Adding to 70043440 its reverse (4434007), we get a palindrome (74477447).

The spelling of 70043440 in words is "seventy million, forty-three thousand, four hundred forty".