1213286040 has 160 divisors (see below), whose sum is σ = 4292838000. Its totient is φ = 306498816.

The previous prime is 1213286023. The next prime is 1213286083. The reversal of 1213286040 is 406823121.

1213286040 is a `hidden beast` number, since 1 + 21 + 32 + 8 + 604 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1213285995 and 1213286013.

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 51706 + ... + 71414.

Almost surely, 2^1213286040 is an apocalyptic number.

1213286040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213286040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2146419000).

1213286040 is an abundant number, since it is smaller than the sum of its proper divisors (3079551960).

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

1213286040 is a wasteful number, since it uses less digits than its factorization.

1213286040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19751 (or 19738 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 1213286040 is about 34832.2557409077. The cubic root of 1213286040 is about 1066.5659961415.

The spelling of 1213286040 in words is "one billion, two hundred thirteen million, two hundred eighty-six thousand, forty".