74204391 has 8 divisors (see below), whose sum is σ = 99051904. Its totient is φ = 49413240.

The previous prime is 74204387. The next prime is 74204401. The reversal of 74204391 is 19340247.

It is a happy number.

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

It is not a de Polignac number, because 74204391 - 2² = 74204387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74204191) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 10915 + ... + 16356.

It is an arithmetic number, because the mean of its divisors is an integer number (12381488).

Almost surely, 2^74204391 is an apocalyptic number.

74204391 is a deficient number, since it is larger than the sum of its proper divisors (24847513).

74204391 is a wasteful number, since it uses less digits than its factorization.

74204391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28181.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 74204391 is about 8614.1970606668. The cubic root of 74204391 is about 420.2198225694.

It can be divided in two parts, 7420 and 4391, that added together give a palindrome (11811).

The spelling of 74204391 in words is "seventy-four million, two hundred four thousand, three hundred ninety-one".