74642128 has 20 divisors (see below), whose sum is σ = 157766688. Its totient is φ = 33928160.

The previous prime is 74642119. The next prime is 74642137. The reversal of 74642128 is 82124647.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74642119) and next prime (74642137).

It is a junction number, because it is equal to n+sod(n) for n = 74642093 and 74642102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211876 + ... + 212227.

Almost surely, 2^74642128 is an apocalyptic number.

It is an amenable number.

74642128 is an abundant number, since it is smaller than the sum of its proper divisors (83124560).

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

74642128 is a wasteful number, since it uses less digits than its factorization.

74642128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424122 (or 424116 counting only the distinct ones).

The product of its digits is 21504, while the sum is 34.

The square root of 74642128 is about 8639.5675817717. The cubic root of 74642128 is about 421.0445053125.

The spelling of 74642128 in words is "seventy-four million, six hundred forty-two thousand, one hundred twenty-eight".