1220463144 has 96 divisors (see below), whose sum is σ = 3477708000. Its totient is φ = 386096256.

The previous prime is 1220463143. The next prime is 1220463151. The reversal of 1220463144 is 4413640221.

It is a happy number.

1220463144 is a `hidden beast` number, since 1 + 2 + 20 + 4 + 631 + 4 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (1220463143) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 118239 + ... + 128145.

It is an arithmetic number, because the mean of its divisors is an integer number (36226125).

Almost surely, 2^1220463144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1220463144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1738854000).

1220463144 is an abundant number, since it is smaller than the sum of its proper divisors (2257244856).

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

1220463144 is a wasteful number, since it uses less digits than its factorization.

1220463144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10007 (or 10000 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 1220463144 is about 34935.1276511193. The cubic root of 1220463144 is about 1068.6649270131.

The spelling of 1220463144 in words is "one billion, two hundred twenty million, four hundred sixty-three thousand, one hundred forty-four".