1630440361 has 8 divisors (see below), whose sum is σ = 1779081984. Its totient is φ = 1481868720.

The previous prime is 1630440341. The next prime is 1630440389.

1630440361 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1630440361 - 2¹³ = 1630432169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1630440341) 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, 39240 + ... + 69286.

It is an arithmetic number, because the mean of its divisors is an integer number (222385248).

Almost surely, 2^1630440361 is an apocalyptic number.

1630440361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1630440361 is a deficient number, since it is larger than the sum of its proper divisors (148641623).

1630440361 is a wasteful number, since it uses less digits than its factorization.

1630440361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34991.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 1630440361 is about 40378.7117303165. The cubic root of 1630440361 is about 1176.9778936446.

It can be divided in two parts, 16304 and 40361, that added together give a palindrome (56665).

The spelling of 1630440361 in words is "one billion, six hundred thirty million, four hundred forty thousand, three hundred sixty-one".