74238487 has 4 divisors (see below), whose sum is σ = 74255776. Its totient is φ = 74221200.

The previous prime is 74238481. The next prime is 74238509. The reversal of 74238487 is 78483247.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-74238487 is a prime.

It is a super-2 number, since 2×74238487² = 11022705904098338, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74238481) 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 3 ways as a sum of consecutive naturals, for example, 3283 + ... + 12619.

It is an arithmetic number, because the mean of its divisors is an integer number (18563944).

Almost surely, 2^74238487 is an apocalyptic number.

74238487 is a deficient number, since it is larger than the sum of its proper divisors (17289).

74238487 is an equidigital number, since it uses as much as digits as its factorization.

74238487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288.

The product of its digits is 301056, while the sum is 43.

The square root of 74238487 is about 8616.1758918908. The cubic root of 74238487 is about 420.2841746513.

The spelling of 74238487 in words is "seventy-four million, two hundred thirty-eight thousand, four hundred eighty-seven".