74770438 has 4 divisors (see below), whose sum is σ = 112155660. Its totient is φ = 37385218.

The previous prime is 74770417. The next prime is 74770441. The reversal of 74770438 is 83407747.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 74770438.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18692608 + ... + 18692611.

It is an arithmetic number, because the mean of its divisors is an integer number (28038915).

Almost surely, 2^74770438 is an apocalyptic number.

74770438 is a deficient number, since it is larger than the sum of its proper divisors (37385222).

74770438 is a wasteful number, since it uses less digits than its factorization.

74770438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37385221.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 74770438 is about 8646.9901121720. The cubic root of 74770438 is about 421.2856260465.

The spelling of 74770438 in words is "seventy-four million, seven hundred seventy thousand, four hundred thirty-eight".