74388140 has 24 divisors (see below), whose sum is σ = 157652880. Its totient is φ = 29481408.

The previous prime is 74388137. The next prime is 74388143. The reversal of 74388140 is 4188347.

74388140 = T₁₁₁ + T₁₁₂ + ... + T₇₆₄.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (74388137) and next prime (74388143).

It is a self number, because there is not a number n which added to its sum of digits gives 74388140.

It is not an unprimeable number, because it can be changed into a prime (74388143) 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 7 ways as a sum of consecutive naturals, for example, 14882 + ... + 19241.

It is an arithmetic number, because the mean of its divisors is an integer number (6568870).

Almost surely, 2^74388140 is an apocalyptic number.

It is an amenable number.

74388140 is an abundant number, since it is smaller than the sum of its proper divisors (83264740).

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

74388140 is a wasteful number, since it uses less digits than its factorization.

74388140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34241 (or 34239 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 74388140 is about 8624.8559408259. The cubic root of 74388140 is about 420.5663938168.

The spelling of 74388140 in words is "seventy-four million, three hundred eighty-eight thousand, one hundred forty".