74320240 has 20 divisors (see below), whose sum is σ = 172794744. Its totient is φ = 29728064.

The previous prime is 74320231. The next prime is 74320271. The reversal of 74320240 is 4202347.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 464422 + ... + 464581.

Almost surely, 2^74320240 is an apocalyptic number.

It is an amenable number.

74320240 is an abundant number, since it is smaller than the sum of its proper divisors (98474504).

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

74320240 is a wasteful number, since it uses less digits than its factorization.

74320240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929016 (or 929010 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 22.

The square root of 74320240 is about 8620.9187445423. The cubic root of 74320240 is about 420.4383933446.

Adding to 74320240 its reverse (4202347), we get a palindrome (78522587).

The spelling of 74320240 in words is "seventy-four million, three hundred twenty thousand, two hundred forty".