74151240 has 128 divisors (see below), whose sum is σ = 230947200. Its totient is φ = 19036160.

The previous prime is 74151239. The next prime is 74151251. The reversal of 74151240 is 4215147.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 74151240.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 565975 + ... + 566105.

It is an arithmetic number, because the mean of its divisors is an integer number (1804275).

Almost surely, 2^74151240 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 74151240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115473600).

74151240 is an abundant number, since it is smaller than the sum of its proper divisors (156795960).

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

74151240 is a wasteful number, since it uses less digits than its factorization.

74151240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 283 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 74151240 is about 8611.1114265233. Note that the first 3 decimals coincide. The cubic root of 74151240 is about 420.1194671487.

Adding to 74151240 its reverse (4215147), we get a palindrome (78366387).

The spelling of 74151240 in words is "seventy-four million, one hundred fifty-one thousand, two hundred forty".