74739438 has 48 divisors (see below), whose sum is σ = 170099280. Its totient is φ = 23683968.

The previous prime is 74739421. The next prime is 74739439. The reversal of 74739438 is 83493747.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74739393 and 74739402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74739439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 33906 + ... + 36042.

It is an arithmetic number, because the mean of its divisors is an integer number (3543735).

Almost surely, 2^74739438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74739438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85049640).

74739438 is an abundant number, since it is smaller than the sum of its proper divisors (95359842).

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

74739438 is a wasteful number, since it uses less digits than its factorization.

74739438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2241 (or 2238 counting only the distinct ones).

The product of its digits is 508032, while the sum is 45.

The square root of 74739438 is about 8645.1973950859. The cubic root of 74739438 is about 421.2273959935.

The spelling of 74739438 in words is "seventy-four million, seven hundred thirty-nine thousand, four hundred thirty-eight".