1649836730 has 8 divisors (see below), whose sum is σ = 2969706132. Its totient is φ = 659934688.

The previous prime is 1649836729. The next prime is 1649836787. The reversal of 1649836730 is 376389461.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1320668281 + 329168449 = 36341^2 + 18143^2 .

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

It is a super-2 number, since 2×1649836730² = 5443922471314185800, 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, 82491827 + ... + 82491846.

Almost surely, 2^1649836730 is an apocalyptic number.

1649836730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1649836730 is a deficient number, since it is larger than the sum of its proper divisors (1319869402).

1649836730 is a wasteful number, since it uses less digits than its factorization.

1649836730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164983680.

The product of its (nonzero) digits is 653184, while the sum is 47.

The square root of 1649836730 is about 40618.1822586880. The cubic root of 1649836730 is about 1181.6267733097.

The spelling of 1649836730 in words is "one billion, six hundred forty-nine million, eight hundred thirty-six thousand, seven hundred thirty".