74543820 has 48 divisors (see below), whose sum is σ = 224780640. Its totient is φ = 18349056.

The previous prime is 74543803. The next prime is 74543831. The reversal of 74543820 is 2834547.

It is a super-2 number, since 2×74543820² = 11113562200384800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47005 + ... + 48564.

It is an arithmetic number, because the mean of its divisors is an integer number (4682930).

Almost surely, 2^74543820 is an apocalyptic number.

It is an amenable number.

74543820 is an abundant number, since it is smaller than the sum of its proper divisors (150236820).

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

74543820 is a wasteful number, since it uses less digits than its factorization.

74543820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95594 (or 95592 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 74543820 is about 8633.8763021021. The cubic root of 74543820 is about 420.8595774460.

The spelling of 74543820 in words is "seventy-four million, five hundred forty-three thousand, eight hundred twenty".