74840823 has 12 divisors (see below), whose sum is σ = 110143800. Its totient is φ = 48952176.

The previous prime is 74840819. The next prime is 74840837. The reversal of 74840823 is 32804847.

It is not a de Polignac number, because 74840823 - 2² = 74840819 is a prime.

It is a super-2 number, since 2×74840823² = 11202297574634658, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74840803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 77973 + ... + 78926.

It is an arithmetic number, because the mean of its divisors is an integer number (9178650).

Almost surely, 2^74840823 is an apocalyptic number.

74840823 is a deficient number, since it is larger than the sum of its proper divisors (35302977).

74840823 is a wasteful number, since it uses less digits than its factorization.

74840823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156958 (or 156955 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 74840823 is about 8651.0590681141. The cubic root of 74840823 is about 421.4177767115.

The spelling of 74840823 in words is "seventy-four million, eight hundred forty thousand, eight hundred twenty-three".