74638490 has 16 divisors (see below), whose sum is σ = 134578152. Its totient is φ = 29804544.

The previous prime is 74638477. The next prime is 74638511. The reversal of 74638490 is 9483647.

It can be written as a sum of positive squares in 4 ways, for example, as 16589329 + 58049161 = 4073^2 + 7619^2 .

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 7 ways as a sum of consecutive naturals, for example, 122 + ... + 12218.

Almost surely, 2^74638490 is an apocalyptic number.

74638490 is a deficient number, since it is larger than the sum of its proper divisors (59939662).

74638490 is a wasteful number, since it uses less digits than its factorization.

74638490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12721.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 74638490 is about 8639.3570362614. The cubic root of 74638490 is about 421.0376647394.

The spelling of 74638490 in words is "seventy-four million, six hundred thirty-eight thousand, four hundred ninety".