1630440738 has 20 divisors (see below), whose sum is σ = 3653395350. Its totient is φ = 543480192.

The previous prime is 1630440733. The next prime is 1630440739. The reversal of 1630440738 is 8370440361.

It can be written as a sum of positive squares in only one way, i.e., 1071449289 + 558991449 = 32733^2 + 23643^2 .

It is not an unprimeable number, because it can be changed into a prime (1630440731) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 5032063 + ... + 5032386.

Almost surely, 2^1630440738 is an apocalyptic number.

1630440738 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1630440738 is an abundant number, since it is smaller than the sum of its proper divisors (2022954612).

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

1630440738 is a wasteful number, since it uses less digits than its factorization.

1630440738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10064463 (or 10064454 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 1630440738 is about 40378.7163986177. The cubic root of 1630440738 is about 1176.9779843605.

The spelling of 1630440738 in words is "one billion, six hundred thirty million, four hundred forty thousand, seven hundred thirty-eight".