1220023144 has 32 divisors (see below), whose sum is σ = 2302185600. Its totient is φ = 606121920.

The previous prime is 1220023141. The next prime is 1220023169. The reversal of 1220023144 is 4413200221.

It is not an unprimeable number, because it can be changed into a prime (1220023141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091674 + ... + 1092790.

It is an arithmetic number, because the mean of its divisors is an integer number (71943300).

Almost surely, 2^1220023144 is an apocalyptic number.

It is an amenable number.

1220023144 is a deficient number, since it is larger than the sum of its proper divisors (1082162456).

1220023144 is a wasteful number, since it uses less digits than its factorization.

1220023144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 1220023144 is about 34928.8296969710. The cubic root of 1220023144 is about 1068.5364869510.

Adding to 1220023144 its reverse (4413200221), we get a palindrome (5633223365).

It can be divided in two parts, 12200 and 23144, that added together give a square (35344 = 188²).

The spelling of 1220023144 in words is "one billion, two hundred twenty million, twenty-three thousand, one hundred forty-four".