74749830 has 16 divisors (see below), whose sum is σ = 179399664. Its totient is φ = 19933280.

The previous prime is 74749817. The next prime is 74749837. The reversal of 74749830 is 3894747.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74749837) 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 7 ways as a sum of consecutive naturals, for example, 1245801 + ... + 1245860.

It is an arithmetic number, because the mean of its divisors is an integer number (11212479).

Almost surely, 2^74749830 is an apocalyptic number.

74749830 is an abundant number, since it is smaller than the sum of its proper divisors (104649834).

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

74749830 is a wasteful number, since it uses less digits than its factorization.

74749830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491671.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 74749830 is about 8645.7984015359. The cubic root of 74749830 is about 421.2469180038.

The spelling of 74749830 in words is "seventy-four million, seven hundred forty-nine thousand, eight hundred thirty".