1240084989 has 144 divisors (see below), whose sum is σ = 2302110720. Its totient is φ = 635506560.

The previous prime is 1240084987. The next prime is 1240084991. The reversal of 1240084989 is 9894800421.

It is an interprime number because it is at equal distance from previous prime (1240084987) and next prime (1240084991).

It is not a de Polignac number, because 1240084989 - 2¹ = 1240084987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240084981) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 14940742 + ... + 14940824.

It is an arithmetic number, because the mean of its divisors is an integer number (15986880).

Almost surely, 2^1240084989 is an apocalyptic number.

1240084989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1240084989 is a deficient number, since it is larger than the sum of its proper divisors (1062025731).

1240084989 is a wasteful number, since it uses less digits than its factorization.

1240084989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192 (or 176 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The square root of 1240084989 is about 35214.8404653493. The cubic root of 1240084989 is about 1074.3616152759.

The spelling of 1240084989 in words is "one billion, two hundred forty million, eighty-four thousand, nine hundred eighty-nine".