74021678 has 4 divisors (see below), whose sum is σ = 111032520. Its totient is φ = 37010838.

The previous prime is 74021677. The next prime is 74021699. The reversal of 74021678 is 87612047.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87612047 = 2357 ⋅37171.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74021677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18505418 + ... + 18505421.

It is an arithmetic number, because the mean of its divisors is an integer number (27758130).

Almost surely, 2^74021678 is an apocalyptic number.

74021678 is a deficient number, since it is larger than the sum of its proper divisors (37010842).

74021678 is a wasteful number, since it uses less digits than its factorization.

74021678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37010841.

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 74021678 is about 8603.5851829339. The cubic root of 74021678 is about 419.8746375664.

The spelling of 74021678 in words is "seventy-four million, twenty-one thousand, six hundred seventy-eight".