70287440 has 20 divisors (see below), whose sum is σ = 163418484. Its totient is φ = 28114944.

The previous prime is 70287421. The next prime is 70287491. The reversal of 70287440 is 4478207.

It can be written as a sum of positive squares in 2 ways, for example, as 37063744 + 33223696 = 6088^2 + 5764^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 70287397 and 70287406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439217 + ... + 439376.

Almost surely, 2^70287440 is an apocalyptic number.

It is an amenable number.

70287440 is an abundant number, since it is smaller than the sum of its proper divisors (93131044).

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

70287440 is a wasteful number, since it uses less digits than its factorization.

70287440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878606 (or 878600 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 70287440 is about 8383.7604927622. The cubic root of 70287440 is about 412.6918654426.

The spelling of 70287440 in words is "seventy million, two hundred eighty-seven thousand, four hundred forty".