74778916 has 12 divisors (see below), whose sum is σ = 134055180. Its totient is φ = 36477440.

The previous prime is 74778871. The next prime is 74778917. The reversal of 74778916 is 61987747.

It can be written as a sum of positive squares in 2 ways, for example, as 4218916 + 70560000 = 2054^2 + 8400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74778916.

It is not an unprimeable number, because it can be changed into a prime (74778917) 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, 227821 + ... + 228148.

It is an arithmetic number, because the mean of its divisors is an integer number (11171265).

Almost surely, 2^74778916 is an apocalyptic number.

It is an amenable number.

74778916 is a deficient number, since it is larger than the sum of its proper divisors (59276264).

74778916 is a wasteful number, since it uses less digits than its factorization.

74778916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456014 (or 456012 counting only the distinct ones).

The product of its digits is 592704, while the sum is 49.

The square root of 74778916 is about 8647.4803266616. The cubic root of 74778916 is about 421.3015482240.

The spelling of 74778916 in words is "seventy-four million, seven hundred seventy-eight thousand, nine hundred sixteen".