74382881 has 4 divisors (see below), whose sum is σ = 74400132. Its totient is φ = 74365632.

The previous prime is 74382863. The next prime is 74382887. The reversal of 74382881 is 18828347.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18828347 = 647 ⋅29101.

It can be written as a sum of positive squares in 2 ways, for example, as 69472225 + 4910656 = 8335^2 + 2216^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74382881 is a prime.

It is a super-2 number, since 2×74382881² = 11065625971720322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74382887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4181 + ... + 12893.

It is an arithmetic number, because the mean of its divisors is an integer number (18600033).

Almost surely, 2^74382881 is an apocalyptic number.

It is an amenable number.

74382881 is a deficient number, since it is larger than the sum of its proper divisors (17251).

74382881 is an equidigital number, since it uses as much as digits as its factorization.

74382881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17250.

The product of its digits is 86016, while the sum is 41.

The square root of 74382881 is about 8624.5510607799. The cubic root of 74382881 is about 420.5564826903.

The spelling of 74382881 in words is "seventy-four million, three hundred eighty-two thousand, eight hundred eighty-one".