1900939388 has 12 divisors (see below), whose sum is σ = 3522328992. Its totient is φ = 894559680.

The previous prime is 1900939387. The next prime is 1900939421. The reversal of 1900939388 is 8839390091.

It is a super-2 number, since 2×1900939388² = 7227141113699629088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900939387) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13977428 + ... + 13977563.

It is an arithmetic number, because the mean of its divisors is an integer number (293527416).

Almost surely, 2^1900939388 is an apocalyptic number.

It is an amenable number.

1900939388 is a deficient number, since it is larger than the sum of its proper divisors (1621389604).

1900939388 is a wasteful number, since it uses less digits than its factorization.

1900939388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27955012 (or 27955010 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 50.

The square root of 1900939388 is about 43599.7636232125. The cubic root of 1900939388 is about 1238.7664171553.

The spelling of 1900939388 in words is "one billion, nine hundred million, nine hundred thirty-nine thousand, three hundred eighty-eight".