1217940460 has 48 divisors (see below), whose sum is σ = 2794321152. Its totient is φ = 442232000.

The previous prime is 1217940331. The next prime is 1217940473. The reversal of 1217940460 is 640497121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 159735 + ... + 167185.

It is an arithmetic number, because the mean of its divisors is an integer number (58215024).

Almost surely, 2^1217940460 is an apocalyptic number.

1217940460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1217940460 is an abundant number, since it is smaller than the sum of its proper divisors (1576380692).

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

1217940460 is a wasteful number, since it uses less digits than its factorization.

1217940460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8214 (or 8212 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 1217940460 is about 34899.0037107078. The cubic root of 1217940460 is about 1067.9281128701.

The spelling of 1217940460 in words is "one billion, two hundred seventeen million, nine hundred forty thousand, four hundred sixty".