1630385234 has 4 divisors (see below), whose sum is σ = 2445577854. Its totient is φ = 815192616.

The previous prime is 1630385227. The next prime is 1630385257. The reversal of 1630385234 is 4325830361.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4325830361 = 28927 ⋅149543.

It can be written as a sum of positive squares in only one way, i.e., 1495755625 + 134629609 = 38675^2 + 11603^2 .

It is a super-2 number, since 2×1630385234² = 5316312022490469512, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 1630385194 and 1630385203.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 407596307 + ... + 407596310.

Almost surely, 2^1630385234 is an apocalyptic number.

1630385234 is a deficient number, since it is larger than the sum of its proper divisors (815192620).

1630385234 is an equidigital number, since it uses as much as digits as its factorization.

1630385234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815192619.

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 1630385234 is about 40378.0290999945. The cubic root of 1630385234 is about 1176.9646285184.

The spelling of 1630385234 in words is "one billion, six hundred thirty million, three hundred eighty-five thousand, two hundred thirty-four".