1990350170 has 16 divisors (see below), whose sum is σ = 3583151208. Its totient is φ = 796024320.

The previous prime is 1990350169. The next prime is 1990350211. The reversal of 1990350170 is 710530991.

It can be written as a sum of positive squares in 4 ways, for example, as 1705111849 + 285238321 = 41293^2 + 16889^2 .

It is a super-2 number, since 2×1990350170² = 7922987598438057800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1990350170.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103730 + ... + 121410.

Almost surely, 2^1990350170 is an apocalyptic number.

1990350170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1990350170 is a deficient number, since it is larger than the sum of its proper divisors (1592801038).

1990350170 is a wasteful number, since it uses less digits than its factorization.

1990350170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28945.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 1990350170 is about 44613.3407177719. The cubic root of 1990350170 is about 1257.8914448384.

The spelling of 1990350170 in words is "one billion, nine hundred ninety million, three hundred fifty thousand, one hundred seventy".