74430 has 24 divisors (see below), whose sum is σ = 193752. Its totient is φ = 19824.
The previous prime is 74419. The next prime is 74441. The reversal of 74430 is 3447.
74430 = 1202 + 1212 + ... + 1242.
It is an interprime number because it is at equal distance from previous prime (74419) and next prime (74441).
It is a Harshad number since it is a multiple of its sum of digits (18).
It is a Curzon number.
It is a plaindrome in base 16.
It is a nialpdrome in base 10.
It is a congruent number.
It is an unprimeable number.
74430 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 11 ways as a sum of consecutive naturals, for example, 324 + ... + 503.
It is an arithmetic number, because the mean of its divisors is an integer number (8073).
274430 is an apocalyptic number.
74430 is an abundant number, since it is smaller than the sum of its proper divisors (119322).
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 (96876).
74430 is a wasteful number, since it uses less digits than its factorization.
74430 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 840 (or 837 counting only the distinct ones).
The product of its (nonzero) digits is 336, while the sum is 18.
The square root of 74430 is about 272.8186210654. The cubic root of 74430 is about 42.0645266641.
Adding to 74430 its reverse (3447), we get a palindrome (77877).
The spelling of 74430 in words is "seventy-four thousand, four hundred thirty".
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