74019906 has 80 divisors (see below), whose sum is σ = 174300984. Its totient is φ = 23452416.

The previous prime is 74019893. The next prime is 74019929. The reversal of 74019906 is 60991047.

It can be written as a sum of positive squares in 4 ways, for example, as 70812225 + 3207681 = 8415^2 + 1791^2 .

It is a Curzon 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 in 39 ways as a sum of consecutive naturals, for example, 317566 + ... + 317798.

Almost surely, 2^74019906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74019906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87150492).

74019906 is an abundant number, since it is smaller than the sum of its proper divisors (100281078).

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

74019906 is a wasteful number, since it uses less digits than its factorization.

74019906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 74019906 is about 8603.4822019924. The cubic root of 74019906 is about 419.8712870894.

The spelling of 74019906 in words is "seventy-four million, nineteen thousand, nine hundred six".