1990077108 has 24 divisors (see below), whose sum is σ = 4644494400. Its totient is φ = 663218880.

The previous prime is 1990077091. The next prime is 1990077127. The reversal of 1990077108 is 8017700991.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990077108.

It is a congruent number.

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, 52993 + ... + 82391.

It is an arithmetic number, because the mean of its divisors is an integer number (193520600).

Almost surely, 2^1990077108 is an apocalyptic number.

It is an amenable number.

1990077108 is an abundant number, since it is smaller than the sum of its proper divisors (2654417292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1990077108 is a wasteful number, since it uses less digits than its factorization.

1990077108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35047 (or 35045 counting only the distinct ones).

The product of its (nonzero) digits is 31752, while the sum is 42.

The square root of 1990077108 is about 44610.2802950172. The cubic root of 1990077108 is about 1257.8339175972.

The spelling of 1990077108 in words is "one billion, nine hundred ninety million, seventy-seven thousand, one hundred eight".