1240661984 has 24 divisors (see below), whose sum is σ = 2461794048. Its totient is φ = 615444480.

The previous prime is 1240661969. The next prime is 1240661993. The reversal of 1240661984 is 4891660421.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148577 + ... + 156704.

It is an arithmetic number, because the mean of its divisors is an integer number (102574752).

Almost surely, 2^1240661984 is an apocalyptic number.

It is an amenable number.

1240661984 is a deficient number, since it is larger than the sum of its proper divisors (1221132064).

1240661984 is a wasteful number, since it uses less digits than its factorization.

1240661984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305418 (or 305410 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 41.

The square root of 1240661984 is about 35223.0320103196. The cubic root of 1240661984 is about 1074.5282181476.

The spelling of 1240661984 in words is "one billion, two hundred forty million, six hundred sixty-one thousand, nine hundred eighty-four".