70438725 has 54 divisors (see below), whose sum is σ = 146784690. Its totient is φ = 32195520.

The previous prime is 70438723. The next prime is 70438733. The reversal of 70438725 is 52783407.

It can be written as a sum of positive squares in 3 ways, for example, as 933156 + 69505569 = 966^2 + 8337^2 .

It is not a de Polignac number, because 70438725 - 2¹ = 70438723 is a prime.

It is a super-2 number, since 2×70438725² = 9923227959251250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70438725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70438723) by changing a digit.

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 53 ways as a sum of consecutive naturals, for example, 7831 + ... + 14219.

It is an arithmetic number, because the mean of its divisors is an integer number (2718235).

Almost surely, 2^70438725 is an apocalyptic number.

70438725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

70438725 is an abundant number, since it is smaller than the sum of its proper divisors (76345965).

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

70438725 is a wasteful number, since it uses less digits than its factorization.

70438725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6419 (or 6404 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 36.

The square root of 70438725 is about 8392.7781455249. The cubic root of 70438725 is about 412.9877426220.

The spelling of 70438725 in words is "seventy million, four hundred thirty-eight thousand, seven hundred twenty-five".