1938880336 has 20 divisors (see below), whose sum is σ = 3770150932. Its totient is φ = 965938176.

The previous prime is 1938880309. The next prime is 1938880369. The reversal of 1938880336 is 6330888391.

It can be written as a sum of positive squares in 2 ways, for example, as 244734736 + 1694145600 = 15644^2 + 41160^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1938880336.

It is a congruent number.

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, 214305 + ... + 223168.

Almost surely, 2^1938880336 is an apocalyptic number.

1938880336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1938880336 is a deficient number, since it is larger than the sum of its proper divisors (1831270596).

1938880336 is a wasteful number, since it uses less digits than its factorization.

1938880336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 437758 (or 437752 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 49.

The square root of 1938880336 is about 44032.7189258170. The cubic root of 1938880336 is about 1246.9537205224.

The spelling of 1938880336 in words is "one billion, nine hundred thirty-eight million, eight hundred eighty thousand, three hundred thirty-six".