74128331 has 8 divisors (see below), whose sum is σ = 76299264. Its totient is φ = 71988840.

The previous prime is 74128303. The next prime is 74128337. The reversal of 74128331 is 13382147.

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

It is a cyclic number.

It is not a de Polignac number, because 74128331 - 2⁶ = 74128267 is a prime.

It is a super-2 number, since 2×74128331² = 10990018913691122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 74128294 and 74128303.

It is not an unprimeable number, because it can be changed into a prime (74128337) 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, 3035 + ... + 12548.

It is an arithmetic number, because the mean of its divisors is an integer number (9537408).

Almost surely, 2^74128331 is an apocalyptic number.

74128331 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

74128331 is a deficient number, since it is larger than the sum of its proper divisors (2170933).

74128331 is a wasteful number, since it uses less digits than its factorization.

74128331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15721.

The product of its digits is 4032, while the sum is 29.

The square root of 74128331 is about 8609.7811238149. The cubic root of 74128331 is about 420.0761974375.

The spelling of 74128331 in words is "seventy-four million, one hundred twenty-eight thousand, three hundred thirty-one".