74980240 has 20 divisors (see below), whose sum is σ = 174329244. Its totient is φ = 29992064.

The previous prime is 74980231. The next prime is 74980247. The reversal of 74980240 is 4208947.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 36192256 + 38787984 = 6016^2 + 6228^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 74980196 and 74980205.

It is not an unprimeable number, because it can be changed into a prime (74980247) 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, 468547 + ... + 468706.

Almost surely, 2^74980240 is an apocalyptic number.

It is an amenable number.

74980240 is an abundant number, since it is smaller than the sum of its proper divisors (99349004).

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

74980240 is a wasteful number, since it uses less digits than its factorization.

74980240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937266 (or 937260 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 74980240 is about 8659.1131185590. The cubic root of 74980240 is about 421.6792933323.

The spelling of 74980240 in words is "seventy-four million, nine hundred eighty thousand, two hundred forty".