1213040032 has 24 divisors (see below), whose sum is σ = 2528654436. Its totient is φ = 570842112.

The previous prime is 1213040021. The next prime is 1213040039. The reversal of 1213040032 is 2300403121.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1031437456 + 181602576 = 32116^2 + 13476^2 .

It is a super-2 number, since 2×1213040032² = 2942932238469122048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1213039988 and 1213040015.

It is not an unprimeable number, because it can be changed into a prime (1213040039) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1114383 + ... + 1115470.

Almost surely, 2^1213040032 is an apocalyptic number.

It is an amenable number.

1213040032 is an abundant number, since it is smaller than the sum of its proper divisors (1315614404).

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

1213040032 is a wasteful number, since it uses less digits than its factorization.

1213040032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2229880 (or 2229872 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 1213040032 is about 34828.7242373303. The cubic root of 1213040032 is about 1066.4939050064.

Adding to 1213040032 its reverse (2300403121), we get a palindrome (3513443153).

The spelling of 1213040032 in words is "one billion, two hundred thirteen million, forty thousand, thirty-two".