74512240 has 40 divisors (see below), whose sum is σ = 188992368. Its totient is φ = 27095040.

The previous prime is 74512231. The next prime is 74512253. The reversal of 74512240 is 4221547.

It is a tau number, because it is divible by the number of its divisors (40).

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, 41457 + ... + 43216.

Almost surely, 2^74512240 is an apocalyptic number.

It is an amenable number.

74512240 is an abundant number, since it is smaller than the sum of its proper divisors (114480128).

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

74512240 is a wasteful number, since it uses less digits than its factorization.

74512240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84697 (or 84691 counting only the distinct ones).

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

The square root of 74512240 is about 8632.0472658576. The cubic root of 74512240 is about 420.8001375857.

Adding to 74512240 its reverse (4221547), we get a palindrome (78733787).

The spelling of 74512240 in words is "seventy-four million, five hundred twelve thousand, two hundred forty".