74561240 has 32 divisors (see below), whose sum is σ = 180668880. Its totient is φ = 27530112.

The previous prime is 74561213. The next prime is 74561257. The reversal of 74561240 is 4216547.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71174 + ... + 72213.

Almost surely, 2^74561240 is an apocalyptic number.

It is an amenable number.

74561240 is an abundant number, since it is smaller than the sum of its proper divisors (106107640).

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

74561240 is a wasteful number, since it uses less digits than its factorization.

74561240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143411 (or 143407 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 74561240 is about 8634.8850600341. The cubic root of 74561240 is about 420.8923581774.

Adding to 74561240 its reverse (4216547), we get a palindrome (78777787).

The spelling of 74561240 in words is "seventy-four million, five hundred sixty-one thousand, two hundred forty".