74128983 has 8 divisors (see below), whose sum is σ = 99069696. Its totient is φ = 49303800.

The previous prime is 74128961. The next prime is 74128987. The reversal of 74128983 is 38982147.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74128983 - 2¹² = 74124887 is a prime.

It is a super-2 number, since 2×74128983² = 10990212241228578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74128987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27373 + ... + 29958.

It is an arithmetic number, because the mean of its divisors is an integer number (12383712).

Almost surely, 2^74128983 is an apocalyptic number.

74128983 is a deficient number, since it is larger than the sum of its proper divisors (24940713).

74128983 is a wasteful number, since it uses less digits than its factorization.

74128983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57765.

The product of its digits is 96768, while the sum is 42.

The square root of 74128983 is about 8609.8189876443. The cubic root of 74128983 is about 420.0774290354.

The spelling of 74128983 in words is "seventy-four million, one hundred twenty-eight thousand, nine hundred eighty-three".