74136636 has 72 divisors (see below), whose sum is σ = 223501824. Its totient is φ = 20259360.

The previous prime is 74136607. The next prime is 74136691. The reversal of 74136636 is 63663147.

It is a happy number.

74136636 is a `hidden beast` number, since 7 + 4 + 13 + 6 + 636 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 74136636.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 600 + ... + 12191.

It is an arithmetic number, because the mean of its divisors is an integer number (3104192).

Almost surely, 2^74136636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74136636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111750912).

74136636 is an abundant number, since it is smaller than the sum of its proper divisors (149365188).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74136636 is a wasteful number, since it uses less digits than its factorization.

74136636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12831 (or 12826 counting only the distinct ones).

The product of its digits is 54432, while the sum is 36.

The square root of 74136636 is about 8610.2634106048. The cubic root of 74136636 is about 420.0918846586.

The spelling of 74136636 in words is "seventy-four million, one hundred thirty-six thousand, six hundred thirty-six".