70205438 has 4 divisors (see below), whose sum is σ = 105308160. Its totient is φ = 35102718.

The previous prime is 70205423. The next prime is 70205441. The reversal of 70205438 is 83450207.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83450207 = 37 ⋅2255411.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 70205438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17551358 + ... + 17551361.

It is an arithmetic number, because the mean of its divisors is an integer number (26327040).

Almost surely, 2^70205438 is an apocalyptic number.

70205438 is a deficient number, since it is larger than the sum of its proper divisors (35102722).

70205438 is a wasteful number, since it uses less digits than its factorization.

70205438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35102721.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 70205438 is about 8378.8685393674. The cubic root of 70205438 is about 412.5313117340.

The spelling of 70205438 in words is "seventy million, two hundred five thousand, four hundred thirty-eight".