1216675260 has 72 divisors (see below), whose sum is σ = 3884833680. Its totient is φ = 307369728.

The previous prime is 1216675253. The next prime is 1216675277. The reversal of 1216675260 is 625766121.

It is a happy number.

1216675260 is a `hidden beast` number, since 121 + 6 + 6 + 7 + 526 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 174457 + ... + 181296.

Almost surely, 2^1216675260 is an apocalyptic number.

1216675260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1216675260 is an abundant number, since it is smaller than the sum of its proper divisors (2668158420).

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

1216675260 is a wasteful number, since it uses less digits than its factorization.

1216675260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355787 (or 355782 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1216675260 is about 34880.8724088145. The cubic root of 1216675260 is about 1067.5581958339.

The spelling of 1216675260 in words is "one billion, two hundred sixteen million, six hundred seventy-five thousand, two hundred sixty".