74280384 has 42 divisors (see below), whose sum is σ = 212912960. Its totient is φ = 24759936.

The previous prime is 74280359. The next prime is 74280389. The reversal of 74280384 is 48308247.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74280389) 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 5 ways as a sum of consecutive naturals, for example, 63904 + ... + 65055.

Almost surely, 2^74280384 is an apocalyptic number.

It is an amenable number.

74280384 is an abundant number, since it is smaller than the sum of its proper divisors (138632576).

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

74280384 is a wasteful number, since it uses less digits than its factorization.

74280384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128977 (or 128964 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 36.

The square root of 74280384 is about 8618.6068479772. The cubic root of 74280384 is about 420.3632232028.

The spelling of 74280384 in words is "seventy-four million, two hundred eighty thousand, three hundred eighty-four".