1217827040 has 48 divisors (see below), whose sum is σ = 3028551120. Its totient is φ = 461491200.

The previous prime is 1217827031. The next prime is 1217827043. The reversal of 1217827040 is 407287121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1217826988 and 1217827006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1217827043) 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 7 ways as a sum of consecutive naturals, for example, 197261 + ... + 203340.

It is an arithmetic number, because the mean of its divisors is an integer number (63094815).

Almost surely, 2^1217827040 is an apocalyptic number.

1217827040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217827040 is an abundant number, since it is smaller than the sum of its proper divisors (1810724080).

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

1217827040 is a wasteful number, since it uses less digits than its factorization.

1217827040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400635 (or 400627 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 32.

The square root of 1217827040 is about 34897.3786981200. The cubic root of 1217827040 is about 1067.8949617786.

The spelling of 1217827040 in words is "one billion, two hundred seventeen million, eight hundred twenty-seven thousand, forty".