74280136 has 64 divisors (see below), whose sum is σ = 167961600. Its totient is φ = 30121728.

The previous prime is 74280131. The next prime is 74280137. The reversal of 74280136 is 63108247.

It is a junction number, because it is equal to n+sod(n) for n = 74280098 and 74280107.

It is not an unprimeable number, because it can be changed into a prime (74280131) 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 15 ways as a sum of consecutive naturals, for example, 85641 + ... + 86503.

It is an arithmetic number, because the mean of its divisors is an integer number (2624400).

Almost surely, 2^74280136 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 74280136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83980800).

74280136 is an abundant number, since it is smaller than the sum of its proper divisors (93681464).

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

74280136 is a wasteful number, since it uses less digits than its factorization.

74280136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958 (or 954 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 74280136 is about 8618.5924604891. The cubic root of 74280136 is about 420.3627553799.

The spelling of 74280136 in words is "seventy-four million, two hundred eighty thousand, one hundred thirty-six".