1230402144 has 48 divisors (see below), whose sum is σ = 3317107248. Its totient is φ = 399048192.

The previous prime is 1230402139. The next prime is 1230402161. The reversal of 1230402144 is 4412040321.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 1230402144.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169647 + ... + 176750.

It is an arithmetic number, because the mean of its divisors is an integer number (69106401).

Almost surely, 2^1230402144 is an apocalyptic number.

It is an amenable number.

1230402144 is an abundant number, since it is smaller than the sum of its proper divisors (2086705104).

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

1230402144 is a wasteful number, since it uses less digits than its factorization.

1230402144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346447 (or 346439 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1230402144 is about 35077.0885907026. The cubic root of 1230402144 is about 1071.5580249019.

Adding to 1230402144 its reverse (4412040321), we get a palindrome (5642442465).

The spelling of 1230402144 in words is "one billion, two hundred thirty million, four hundred two thousand, one hundred forty-four".