74388281 has 4 divisors (see below), whose sum is σ = 81150864. Its totient is φ = 67625700.

The previous prime is 74388271. The next prime is 74388289. The reversal of 74388281 is 18288347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74388281 is a prime.

It is a super-2 number, since 2×74388281² = 11067232700269922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (74388289) 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, 3381275 + ... + 3381296.

It is an arithmetic number, because the mean of its divisors is an integer number (20287716).

Almost surely, 2^74388281 is an apocalyptic number.

It is an amenable number.

74388281 is a deficient number, since it is larger than the sum of its proper divisors (6762583).

74388281 is a wasteful number, since it uses less digits than its factorization.

74388281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6762582.

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

The square root of 74388281 is about 8624.8641148716. The cubic root of 74388281 is about 420.5666595393.

The spelling of 74388281 in words is "seventy-four million, three hundred eighty-eight thousand, two hundred eighty-one".