74087680 has 36 divisors (see below), whose sum is σ = 177466212. Its totient is φ = 29634560.

The previous prime is 74087647. The next prime is 74087681. The reversal of 74087680 is 8678047.

It can be written as a sum of positive squares in 2 ways, for example, as 11614464 + 62473216 = 3408^2 + 7904^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74087681) 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, 27661 + ... + 30220.

It is an arithmetic number, because the mean of its divisors is an integer number (4929617).

Almost surely, 2^74087680 is an apocalyptic number.

It is an amenable number.

74087680 is an abundant number, since it is smaller than the sum of its proper divisors (103378532).

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

74087680 is an equidigital number, since it uses as much as digits as its factorization.

74087680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57902 (or 57888 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 74087680 is about 8607.4200548132. The cubic root of 74087680 is about 419.9993953128. Note that the first 3 decimals are identical.

The spelling of 74087680 in words is "seventy-four million, eighty-seven thousand, six hundred eighty".