74220136 has 16 divisors (see below), whose sum is σ = 139934340. Its totient is φ = 36904320.

The previous prime is 74220131. The next prime is 74220163. The reversal of 74220136 is 63102247.

It can be written as a sum of positive squares in 2 ways, for example, as 51122500 + 23097636 = 7150^2 + 4806^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 74220136.

It is not an unprimeable number, because it can be changed into a prime (74220131) 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, 24181 + ... + 27076.

Almost surely, 2^74220136 is an apocalyptic number.

It is an amenable number.

74220136 is a deficient number, since it is larger than the sum of its proper divisors (65714204).

74220136 is a wasteful number, since it uses less digits than its factorization.

74220136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51444 (or 51440 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 74220136 is about 8615.1109104875. The cubic root of 74220136 is about 420.2495418043.

The spelling of 74220136 in words is "seventy-four million, two hundred twenty thousand, one hundred thirty-six".