70447438 has 16 divisors (see below), whose sum is σ = 112844160. Its totient is φ = 32911200.

The previous prime is 70447427. The next prime is 70447453. The reversal of 70447438 is 83474407.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 70447397 and 70447406.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 17793 + ... + 21388.

It is an arithmetic number, because the mean of its divisors is an integer number (7052760).

Almost surely, 2^70447438 is an apocalyptic number.

70447438 is a deficient number, since it is larger than the sum of its proper divisors (42396722).

70447438 is a wasteful number, since it uses less digits than its factorization.

70447438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39243.

The product of its (nonzero) digits is 75264, while the sum is 37.

The square root of 70447438 is about 8393.2972067001. The cubic root of 70447438 is about 413.0047702529.

The spelling of 70447438 in words is "seventy million, four hundred forty-seven thousand, four hundred thirty-eight".