1630720234 has 64 divisors (see below), whose sum is σ = 2941868160. Its totient is φ = 668160000.

The previous prime is 1630720159. The next prime is 1630720237. The reversal of 1630720234 is 4320270361.

It is not an unprimeable number, because it can be changed into a prime (1630720237) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4066434 + ... + 4066834.

It is an arithmetic number, because the mean of its divisors is an integer number (45966690).

Almost surely, 2^1630720234 is an apocalyptic number.

1630720234 is a deficient number, since it is larger than the sum of its proper divisors (1311147926).

1630720234 is a wasteful number, since it uses less digits than its factorization.

1630720234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 1630720234 is about 40382.1771825146. The cubic root of 1630720234 is about 1177.0452344473.

Adding to 1630720234 its reverse (4320270361), we get a palindrome (5950990595).

The spelling of 1630720234 in words is "one billion, six hundred thirty million, seven hundred twenty thousand, two hundred thirty-four".