1649682238 has 4 divisors (see below), whose sum is σ = 2474523360. Its totient is φ = 824841118.

The previous prime is 1649682217. The next prime is 1649682247. The reversal of 1649682238 is 8322869461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8322869461 = 2281 ⋅3648781.

It is a super-3 number, since 3×1649682238³ (a number of 29 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1649682191 and 1649682200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412420558 + ... + 412420561.

It is an arithmetic number, because the mean of its divisors is an integer number (618630840).

Almost surely, 2^1649682238 is an apocalyptic number.

1649682238 is a deficient number, since it is larger than the sum of its proper divisors (824841122).

1649682238 is an equidigital number, since it uses as much as digits as its factorization.

1649682238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824841121.

The product of its digits is 995328, while the sum is 49.

The square root of 1649682238 is about 40616.2804550097. The cubic root of 1649682238 is about 1181.5898893404.

The spelling of 1649682238 in words is "one billion, six hundred forty-nine million, six hundred eighty-two thousand, two hundred thirty-eight".