74015440 has 20 divisors (see below), whose sum is σ = 172086084. Its totient is φ = 29606144.

The previous prime is 74015437. The next prime is 74015443. The reversal of 74015440 is 4451047.

It is an interprime number because it is at equal distance from previous prime (74015437) and next prime (74015443).

It can be written as a sum of positive squares in 2 ways, for example, as 41113744 + 32901696 = 6412^2 + 5736^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74015443) by changing a digit.

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, 462517 + ... + 462676.

Almost surely, 2^74015440 is an apocalyptic number.

It is an amenable number.

74015440 is an abundant number, since it is smaller than the sum of its proper divisors (98070644).

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

74015440 is a wasteful number, since it uses less digits than its factorization.

74015440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925206 (or 925200 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 74015440 is about 8603.2226520066. Note that the first 3 decimals coincide. The cubic root of 74015440 is about 419.8628425912.

Adding to 74015440 its reverse (4451047), we get a palindrome (78466487).

The spelling of 74015440 in words is "seventy-four million, fifteen thousand, four hundred forty".