74840 has 16 divisors (see below), whose sum is σ = 168480. Its totient is φ = 29920.

The previous prime is 74831. The next prime is 74843. The reversal of 74840 is 4847.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74843) by changing a digit.

74840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896 + ... + 975.

It is an arithmetic number, because the mean of its divisors is an integer number (10530).

2⁷⁴⁸⁴⁰ is an apocalyptic number.

It is an amenable number.

74840 is an abundant number, since it is smaller than the sum of its proper divisors (93640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84240).

74840 is a wasteful number, since it uses less digits than its factorization.

74840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1882 (or 1878 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 74840 is about 273.5690040922. The cubic root of 74840 is about 42.1416231975.

The spelling of 74840 in words is "seventy-four thousand, eight hundred forty".