74322240 has 56 divisors (see below), whose sum is σ = 235976160. Its totient is φ = 19819008.

The previous prime is 74322197. The next prime is 74322251. The reversal of 74322240 is 4222347.

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 74322240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37750 + ... + 39669.

It is an arithmetic number, because the mean of its divisors is an integer number (4213860).

Almost surely, 2^74322240 is an apocalyptic number.

It is an amenable number.

74322240 is an abundant number, since it is smaller than the sum of its proper divisors (161653920).

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

74322240 is a wasteful number, since it uses less digits than its factorization.

74322240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77439 (or 77429 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 24.

The square root of 74322240 is about 8621.0347406793. The cubic root of 74322240 is about 420.4421647230.

Adding to 74322240 its reverse (4222347), we get a palindrome (78544587).

The spelling of 74322240 in words is "seventy-four million, three hundred twenty-two thousand, two hundred forty".