74991450 has 24 divisors (see below), whose sum is σ = 185979168. Its totient is φ = 19997680.

The previous prime is 74991443. The next prime is 74991451. The reversal of 74991450 is 5419947.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 74991399 and 74991408.

It is not an unprimeable number, because it can be changed into a prime (74991451) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 249822 + ... + 250121.

It is an arithmetic number, because the mean of its divisors is an integer number (7749132).

Almost surely, 2^74991450 is an apocalyptic number.

74991450 is an abundant number, since it is smaller than the sum of its proper divisors (110987718).

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

74991450 is a wasteful number, since it uses less digits than its factorization.

74991450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 499958 (or 499953 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 74991450 is about 8659.7603892948. The cubic root of 74991450 is about 421.7003068212.

The spelling of 74991450 in words is "seventy-four million, nine hundred ninety-one thousand, four hundred fifty".