74881040 has 80 divisors (see below), whose sum is σ = 189831600. Its totient is φ = 27303936.

The previous prime is 74881021. The next prime is 74881043. The reversal of 74881040 is 4018847.

It can be written as a sum of positive squares in 8 ways, for example, as 3444736 + 71436304 = 1856^2 + 8452^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 74880988 and 74881006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74881043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92156 + ... + 92964.

It is an arithmetic number, because the mean of its divisors is an integer number (2372895).

Almost surely, 2^74881040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 74881040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94915800).

74881040 is an abundant number, since it is smaller than the sum of its proper divisors (114950560).

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

74881040 is a wasteful number, since it uses less digits than its factorization.

74881040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924 (or 918 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 74881040 is about 8653.3831534262. The cubic root of 74881040 is about 421.4932485514.

Adding to 74881040 its reverse (4018847), we get a palindrome (78899887).

The spelling of 74881040 in words is "seventy-four million, eight hundred eighty-one thousand, forty".