74194128 has 30 divisors (see below), whose sum is σ = 207640914. Its totient is φ = 24731328.

The previous prime is 74194111. The next prime is 74194147. The reversal of 74194128 is 82149147.

It can be written as a sum of positive squares in only one way, i.e., 47444544 + 26749584 = 6888^2 + 5172^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 74194092 and 74194101.

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 257475 + ... + 257762.

Almost surely, 2^74194128 is an apocalyptic number.

It is an amenable number.

74194128 is an abundant number, since it is smaller than the sum of its proper divisors (133446786).

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

74194128 is a wasteful number, since it uses less digits than its factorization.

74194128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515251 (or 515242 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 74194128 is about 8613.6013374198. The cubic root of 74194128 is about 420.2004485367.

The spelling of 74194128 in words is "seventy-four million, one hundred ninety-four thousand, one hundred twenty-eight".