74505778 has 8 divisors (see below), whose sum is σ = 112112172. Its totient is φ = 37135056.

The previous prime is 74505773. The next prime is 74505779. The reversal of 74505778 is 87750547.

It can be written as a sum of positive squares in 2 ways, for example, as 59552089 + 14953689 = 7717^2 + 3867^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×74505778² = 11102221910770568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74505773) 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 3 ways as a sum of consecutive naturals, for example, 58125 + ... + 59392.

Almost surely, 2^74505778 is an apocalyptic number.

74505778 is a deficient number, since it is larger than the sum of its proper divisors (37606394).

74505778 is a wasteful number, since it uses less digits than its factorization.

74505778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117836.

The product of its (nonzero) digits is 274400, while the sum is 43.

The square root of 74505778 is about 8631.6729548796. The cubic root of 74505778 is about 420.7879727427.

The spelling of 74505778 in words is "seventy-four million, five hundred five thousand, seven hundred seventy-eight".