74251820 has 96 divisors (see below), whose sum is σ = 173408256. Its totient is φ = 26611200.

The previous prime is 74251813. The next prime is 74251831. The reversal of 74251820 is 2815247.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 584597 + ... + 584723.

It is an arithmetic number, because the mean of its divisors is an integer number (1806336).

Almost surely, 2^74251820 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 74251820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86704128).

74251820 is an abundant number, since it is smaller than the sum of its proper divisors (99156436).

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

74251820 is a wasteful number, since it uses less digits than its factorization.

74251820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 229 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 74251820 is about 8616.9495762712. The cubic root of 74251820 is about 420.3093337195.

The spelling of 74251820 in words is "seventy-four million, two hundred fifty-one thousand, eight hundred twenty".