1240889136 has 40 divisors (see below), whose sum is σ = 3235053360. Its totient is φ = 409833216.

The previous prime is 1240889119. The next prime is 1240889137. The reversal of 1240889136 is 6319880421.

It is not an unprimeable number, because it can be changed into a prime (1240889137) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 113355 + ... + 123818.

It is an arithmetic number, because the mean of its divisors is an integer number (80876334).

Almost surely, 2^1240889136 is an apocalyptic number.

1240889136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1240889136 is an abundant number, since it is smaller than the sum of its proper divisors (1994164224).

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

1240889136 is a wasteful number, since it uses less digits than its factorization.

1240889136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237293 (or 237287 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1240889136 is about 35226.2563438126. The cubic root of 1240889136 is about 1074.5937923712.

The spelling of 1240889136 in words is "one billion, two hundred forty million, eight hundred eighty-nine thousand, one hundred thirty-six".