1230439644 has 36 divisors (see below), whose sum is σ = 3554604144. Its totient is φ = 351554112.

The previous prime is 1230439597. The next prime is 1230439663. The reversal of 1230439644 is 4469340321.

It is a happy number.

1230439644 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 4 + 3 + 9 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 1230439599 and 1230439608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2441097 + ... + 2441600.

It is an arithmetic number, because the mean of its divisors is an integer number (98739004).

Almost surely, 2^1230439644 is an apocalyptic number.

1230439644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1230439644 is an abundant number, since it is smaller than the sum of its proper divisors (2324164500).

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

1230439644 is a wasteful number, since it uses less digits than its factorization.

1230439644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4882714 (or 4882709 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The square root of 1230439644 is about 35077.6231235812. The cubic root of 1230439644 is about 1071.5689110494.

Adding to 1230439644 its reverse (4469340321), we get a palindrome (5699779965).

The spelling of 1230439644 in words is "one billion, two hundred thirty million, four hundred thirty-nine thousand, six hundred forty-four".