1213333040 has 20 divisors (see below), whose sum is σ = 2820999504. Its totient is φ = 485333184.

The previous prime is 1213333019. The next prime is 1213333097. The reversal of 1213333040 is 403333121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7583252 + ... + 7583411.

Almost surely, 2^1213333040 is an apocalyptic number.

1213333040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213333040 is an abundant number, since it is smaller than the sum of its proper divisors (1607666464).

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

1213333040 is a wasteful number, since it uses less digits than its factorization.

1213333040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166676 (or 15166670 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1213333040 is about 34832.9303963936. The cubic root of 1213333040 is about 1066.5797680944.

Adding to 1213333040 its reverse (403333121), we get a palindrome (1616666161).

The spelling of 1213333040 in words is "one billion, two hundred thirteen million, three hundred thirty-three thousand, forty".