70424720 has 40 divisors (see below), whose sum is σ = 164313144. Its totient is φ = 28070912.

The previous prime is 70424719. The next prime is 70424723. The reversal of 70424720 is 2742407.

It can be written as a sum of positive squares in 4 ways, for example, as 1401856 + 69022864 = 1184^2 + 8308^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 70424720.

It is not an unprimeable number, because it can be changed into a prime (70424723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23972 + ... + 26748.

Almost surely, 2^70424720 is an apocalyptic number.

It is an amenable number.

70424720 is an abundant number, since it is smaller than the sum of its proper divisors (93888424).

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

70424720 is a wasteful number, since it uses less digits than its factorization.

70424720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3107 (or 3101 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 26.

The square root of 70424720 is about 8391.9437557696. The cubic root of 70424720 is about 412.9603700050.

The spelling of 70424720 in words is "seventy million, four hundred twenty-four thousand, seven hundred twenty".