1217471040 has 448 divisors, whose sum is σ = 4586630400. Its totient is φ = 303464448.

The previous prime is 1217470987. The next prime is 1217471063. The reversal of 1217471040 is 401747121.

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 = 1217470995 and 1217471013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10774024 + ... + 10774136.

Almost surely, 2^1217471040 is an apocalyptic number.

1217471040 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 1217471040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2293315200).

1217471040 is an abundant number, since it is smaller than the sum of its proper divisors (3369159360).

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

1217471040 is a wasteful number, since it uses less digits than its factorization.

1217471040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 195 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 1217471040 is about 34892.2776556647. The cubic root of 1217471040 is about 1067.7908945495.

The spelling of 1217471040 in words is "one billion, two hundred seventeen million, four hundred seventy-one thousand, forty".