1240420288 has 28 divisors (see below), whose sum is σ = 2463337720. Its totient is φ = 619736832.

The previous prime is 1240420271. The next prime is 1240420297. The reversal of 1240420288 is 8820240421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86323 + ... + 99661.

Almost surely, 2^1240420288 is an apocalyptic number.

It is an amenable number.

1240420288 is a deficient number, since it is larger than the sum of its proper divisors (1222917432).

1240420288 is a wasteful number, since it uses less digits than its factorization.

1240420288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14804 (or 14794 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 1240420288 is about 35219.6009063135. The cubic root of 1240420288 is about 1074.4584365734.

The spelling of 1240420288 in words is "one billion, two hundred forty million, four hundred twenty thousand, two hundred eighty-eight".