1983649670 has 32 divisors (see below), whose sum is σ = 3595269888. Its totient is φ = 787989888.

The previous prime is 1983649663. The next prime is 1983649699. The reversal of 1983649670 is 769463891.

It is a super-2 number, since 2×1983649670² = 7869732026582217800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1241312 + ... + 1242908.

It is an arithmetic number, because the mean of its divisors is an integer number (112352184).

Almost surely, 2^1983649670 is an apocalyptic number.

1983649670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1983649670 is a deficient number, since it is larger than the sum of its proper divisors (1611620218).

1983649670 is a wasteful number, since it uses less digits than its factorization.

1983649670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The square root of 1983649670 is about 44538.1821586827. The cubic root of 1983649670 is about 1256.4782969333.

The spelling of 1983649670 in words is "one billion, nine hundred eighty-three million, six hundred forty-nine thousand, six hundred seventy".