70743440 has 20 divisors (see below), whose sum is σ = 164478684. Its totient is φ = 28297344.

The previous prime is 70743437. The next prime is 70743487. The reversal of 70743440 is 4434707.

It can be written as a sum of positive squares in 2 ways, for example, as 46022656 + 24720784 = 6784^2 + 4972^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 442067 + ... + 442226.

Almost surely, 2^70743440 is an apocalyptic number.

It is an amenable number.

70743440 is an abundant number, since it is smaller than the sum of its proper divisors (93735244).

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

70743440 is a wasteful number, since it uses less digits than its factorization.

70743440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884306 (or 884300 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 70743440 is about 8410.9119600671. The cubic root of 70743440 is about 413.5824085541.

The spelling of 70743440 in words is "seventy million, seven hundred forty-three thousand, four hundred forty".