74532978 has 48 divisors (see below), whose sum is σ = 174545280. Its totient is φ = 22849632.

The previous prime is 74532973. The next prime is 74533009. The reversal of 74532978 is 87923547.

It is not an unprimeable number, because it can be changed into a prime (74532973) 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 23 ways as a sum of consecutive naturals, for example, 103303 + ... + 104021.

It is an arithmetic number, because the mean of its divisors is an integer number (3636360).

Almost surely, 2^74532978 is an apocalyptic number.

74532978 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 74532978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87272640).

74532978 is an abundant number, since it is smaller than the sum of its proper divisors (100012302).

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

74532978 is a wasteful number, since it uses less digits than its factorization.

74532978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183 (or 1180 counting only the distinct ones).

The product of its digits is 423360, while the sum is 45.

The square root of 74532978 is about 8633.2484037007. The cubic root of 74532978 is about 420.8391725317.

The spelling of 74532978 in words is "seventy-four million, five hundred thirty-two thousand, nine hundred seventy-eight".