1212983940 has 96 divisors (see below), whose sum is σ = 4085867520. Its totient is φ = 262659456.

The previous prime is 1212983927. The next prime is 1212983953. The reversal of 1212983940 is 493892121.

It is an interprime number because it is at equal distance from previous prime (1212983927) and next prime (1212983953).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 68022 + ... + 83981.

It is an arithmetic number, because the mean of its divisors is an integer number (42561120).

Almost surely, 2^1212983940 is an apocalyptic number.

1212983940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1212983940 is an abundant number, since it is smaller than the sum of its proper divisors (2872883580).

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

1212983940 is a wasteful number, since it uses less digits than its factorization.

1212983940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152041 (or 152039 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1212983940 is about 34827.9189731457. The cubic root of 1212983940 is about 1066.4774662255.

It can be divided in two parts, 12129 and 83940, that added together give a palindrome (96069).

The spelling of 1212983940 in words is "one billion, two hundred twelve million, nine hundred eighty-three thousand, nine hundred forty".