1233987940 has 24 divisors (see below), whose sum is σ = 2592213120. Its totient is φ = 493435488.

The previous prime is 1233987893. The next prime is 1233987943. The reversal of 1233987940 is 497893321.

It is not an unprimeable number, because it can be changed into a prime (1233987943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68391 + ... + 84529.

It is an arithmetic number, because the mean of its divisors is an integer number (108008880).

Almost surely, 2^1233987940 is an apocalyptic number.

1233987940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1233987940 is an abundant number, since it is smaller than the sum of its proper divisors (1358225180).

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

1233987940 is a wasteful number, since it uses less digits than its factorization.

1233987940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19971 (or 19969 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The square root of 1233987940 is about 35128.1644837871. The cubic root of 1233987940 is about 1072.5979726591.

The spelling of 1233987940 in words is "one billion, two hundred thirty-three million, nine hundred eighty-seven thousand, nine hundred forty".