74421138 has 64 divisors (see below), whose sum is σ = 181025280. Its totient is φ = 20102400.

The previous prime is 74421131. The next prime is 74421161. The reversal of 74421138 is 83112447.

It is not an unprimeable number, because it can be changed into a prime (74421131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19573 + ... + 23063.

It is an arithmetic number, because the mean of its divisors is an integer number (2828520).

Almost surely, 2^74421138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74421138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90512640).

74421138 is an abundant number, since it is smaller than the sum of its proper divisors (106604142).

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

74421138 is a wasteful number, since it uses less digits than its factorization.

74421138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3543.

The product of its digits is 5376, while the sum is 30.

The square root of 74421138 is about 8626.7686882169. The cubic root of 74421138 is about 420.6285712837.

The spelling of 74421138 in words is "seventy-four million, four hundred twenty-one thousand, one hundred thirty-eight".