1930389688 has 32 divisors (see below), whose sum is σ = 3643436160. Its totient is φ = 958826880.

The previous prime is 1930389679. The next prime is 1930389689. The reversal of 1930389688 is 8869830391.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1930389689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1178406 + ... + 1180042.

It is an arithmetic number, because the mean of its divisors is an integer number (113857380).

Almost surely, 2^1930389688 is an apocalyptic number.

It is an amenable number.

1930389688 is a deficient number, since it is larger than the sum of its proper divisors (1713046472).

1930389688 is a wasteful number, since it uses less digits than its factorization.

1930389688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527 (or 2523 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 55.

The square root of 1930389688 is about 43936.2001998352. The cubic root of 1930389688 is about 1245.1308578981.

The spelling of 1930389688 in words is "one billion, nine hundred thirty million, three hundred eighty-nine thousand, six hundred eighty-eight".