74778412 has 12 divisors (see below), whose sum is σ = 132133456. Its totient is φ = 37026000.

The previous prime is 74778397. The next prime is 74778413. The reversal of 74778412 is 21487747.

It is a super-3 number, since 3×74778412³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (74778413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90339 + ... + 91162.

Almost surely, 2^74778412 is an apocalyptic number.

It is an amenable number.

74778412 is a deficient number, since it is larger than the sum of its proper divisors (57355044).

74778412 is a wasteful number, since it uses less digits than its factorization.

74778412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181608 (or 181606 counting only the distinct ones).

The product of its digits is 87808, while the sum is 40.

The square root of 74778412 is about 8647.4511851759. The cubic root of 74778412 is about 421.3006017163.

The spelling of 74778412 in words is "seventy-four million, seven hundred seventy-eight thousand, four hundred twelve".