1630322690 has 8 divisors (see below), whose sum is σ = 2934580860. Its totient is φ = 652129072.

The previous prime is 1630322663. The next prime is 1630322713. The reversal of 1630322690 is 962230361.

It can be written as a sum of positive squares in 2 ways, for example, as 1570616161 + 59706529 = 39631^2 + 7727^2 .

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

It is a super-2 number, since 2×1630322690² = 5315904147057672200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81516125 + ... + 81516144.

Almost surely, 2^1630322690 is an apocalyptic number.

1630322690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1630322690 is a deficient number, since it is larger than the sum of its proper divisors (1304258170).

1630322690 is a wasteful number, since it uses less digits than its factorization.

1630322690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163032276.

The product of its (nonzero) digits is 11664, while the sum is 32.

The square root of 1630322690 is about 40377.2546119718. The cubic root of 1630322690 is about 1176.9495782886.

The spelling of 1630322690 in words is "one billion, six hundred thirty million, three hundred twenty-two thousand, six hundred ninety".