74838438390 has 16 divisors (see below), whose sum is σ = 179612252208. Its totient is φ = 19956916896.

The previous prime is 74838438379. The next prime is 74838438407. The reversal of 74838438390 is 9383483847.

It is a self number, because there is not a number n which added to its sum of digits gives 74838438390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1247307277 + ... + 1247307336.

It is an arithmetic number, because the mean of its divisors is an integer number (11225765763).

Almost surely, 2^74838438390 is an apocalyptic number.

74838438390 is an abundant number, since it is smaller than the sum of its proper divisors (104773813818).

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

74838438390 is a wasteful number, since it uses less digits than its factorization.

74838438390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2494614623.

The product of its (nonzero) digits is 13934592, while the sum is 57.

The spelling of 74838438390 in words is "seventy-four billion, eight hundred thirty-eight million, four hundred thirty-eight thousand, three hundred ninety".