70709724 has 18 divisors (see below), whose sum is σ = 178738560. Its totient is φ = 23569896.

The previous prime is 70709719. The next prime is 70709731. The reversal of 70709724 is 42790707.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 1964159 = 70709724 / (7 + 0 + 7 + 0 + 9 + 7 + 2 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 982044 + ... + 982115.

It is an arithmetic number, because the mean of its divisors is an integer number (9929920).

Almost surely, 2^70709724 is an apocalyptic number.

It is an amenable number.

70709724 is an abundant number, since it is smaller than the sum of its proper divisors (108028836).

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

70709724 is a wasteful number, since it uses less digits than its factorization.

70709724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1964169 (or 1964164 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 70709724 is about 8408.9074201111. The cubic root of 70709724 is about 413.5166942851.

The spelling of 70709724 in words is "seventy million, seven hundred nine thousand, seven hundred twenty-four".