74491798 has 4 divisors (see below), whose sum is σ = 111737700. Its totient is φ = 37245898.

The previous prime is 74491789. The next prime is 74491801. The reversal of 74491798 is 89719447.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 18622948 + ... + 18622951.

It is an arithmetic number, because the mean of its divisors is an integer number (27934425).

Almost surely, 2^74491798 is an apocalyptic number.

74491798 is a deficient number, since it is larger than the sum of its proper divisors (37245902).

74491798 is a wasteful number, since it uses less digits than its factorization.

74491798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37245901.

The product of its digits is 508032, while the sum is 49.

The square root of 74491798 is about 8630.8631086352. The cubic root of 74491798 is about 420.7616527087.

The spelling of 74491798 in words is "seventy-four million, four hundred ninety-one thousand, seven hundred ninety-eight".