1218472632 has 160 divisors (see below), whose sum is σ = 3711892800. Its totient is φ = 371195136.

The previous prime is 1218472627. The next prime is 1218472687. The reversal of 1218472632 is 2362748121.

It is a happy number.

1218472632 is a `hidden beast` number, since 1 + 2 + 18 + 4 + 7 + 2 + 632 = 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 39 ways as a sum of consecutive naturals, for example, 917553 + ... + 918879.

It is an arithmetic number, because the mean of its divisors is an integer number (23199330).

Almost surely, 2^1218472632 is an apocalyptic number.

1218472632 is a gapful number since it is divisible by the number (12) 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 1218472632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1855946400).

1218472632 is an abundant number, since it is smaller than the sum of its proper divisors (2493420168).

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

1218472632 is a wasteful number, since it uses less digits than its factorization.

1218472632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467 (or 1454 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 1218472632 is about 34906.6273363669. The cubic root of 1218472632 is about 1068.0836318804.

The spelling of 1218472632 in words is "one billion, two hundred eighteen million, four hundred seventy-two thousand, six hundred thirty-two".