74450172 has 48 divisors (see below), whose sum is σ = 183036672. Its totient is φ = 23506560.

The previous prime is 74450143. The next prime is 74450177. The reversal of 74450172 is 27105447.

It is a super-2 number, since 2×74450172² = 11085656221659168, which contains 22 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74450177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28272 + ... + 30792.

It is an arithmetic number, because the mean of its divisors is an integer number (3813264).

Almost surely, 2^74450172 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74450172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91518336).

74450172 is an abundant number, since it is smaller than the sum of its proper divisors (108586500).

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

74450172 is a wasteful number, since it uses less digits than its factorization.

74450172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2658 (or 2656 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 74450172 is about 8628.4513094761. The cubic root of 74450172 is about 420.6832642667.

The spelling of 74450172 in words is "seventy-four million, four hundred fifty thousand, one hundred seventy-two".