74409738 has 128 divisors (see below), whose sum is σ = 183859200. Its totient is φ = 19844352.

The previous prime is 74409659. The next prime is 74409743. The reversal of 74409738 is 83790447.

It is a self number, because there is not a number n which added to its sum of digits gives 74409738.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1261153 + ... + 1261211.

It is an arithmetic number, because the mean of its divisors is an integer number (1436400).

Almost surely, 2^74409738 is an apocalyptic number.

74409738 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74409738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91929600).

74409738 is an abundant number, since it is smaller than the sum of its proper divisors (109449462).

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

74409738 is a wasteful number, since it uses less digits than its factorization.

74409738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 74409738 is about 8626.1079288402. The cubic root of 74409738 is about 420.6070925716.

The spelling of 74409738 in words is "seventy-four million, four hundred nine thousand, seven hundred thirty-eight".