1990077892 has 24 divisors (see below), whose sum is σ = 3826982880. Its totient is φ = 897975360.

The previous prime is 1990077889. The next prime is 1990077937. The reversal of 1990077892 is 2987700991.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159042 + ... + 171097.

It is an arithmetic number, because the mean of its divisors is an integer number (159457620).

Almost surely, 2^1990077892 is an apocalyptic number.

It is an amenable number.

1990077892 is a deficient number, since it is larger than the sum of its proper divisors (1836904988).

1990077892 is a wasteful number, since it uses less digits than its factorization.

1990077892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330291 (or 330289 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 1990077892 is about 44610.2890822286. The cubic root of 1990077892 is about 1257.8340827737.

The spelling of 1990077892 in words is "one billion, nine hundred ninety million, seventy-seven thousand, eight hundred ninety-two".