1990350877 has 16 divisors (see below), whose sum is σ = 2121984000. Its totient is φ = 1863861120.

The previous prime is 1990350827. The next prime is 1990350893. The reversal of 1990350877 is 7780530991.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1990350877 is a prime.

It is a super-2 number, since 2×1990350877² = 7922993227149338258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1990350877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1990350827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121999 + ... + 137347.

It is an arithmetic number, because the mean of its divisors is an integer number (132624000).

Almost surely, 2^1990350877 is an apocalyptic number.

It is an amenable number.

1990350877 is a deficient number, since it is larger than the sum of its proper divisors (131633123).

1990350877 is a wasteful number, since it uses less digits than its factorization.

1990350877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15516.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 1990350877 is about 44613.3486414100. The cubic root of 1990350877 is about 1257.8915937785.

The spelling of 1990350877 in words is "one billion, nine hundred ninety million, three hundred fifty thousand, eight hundred seventy-seven".