1969805190 has 32 divisors (see below), whose sum is σ = 4776276960. Its totient is φ = 519865344.

The previous prime is 1969805143. The next prime is 1969805213. The reversal of 1969805190 is 915089691.

It is a super-2 number, since 2×1969805190² = 7760264973101872200, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 335545 + ... + 341364.

It is an arithmetic number, because the mean of its divisors is an integer number (149258655).

Almost surely, 2^1969805190 is an apocalyptic number.

1969805190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1969805190 is an abundant number, since it is smaller than the sum of its proper divisors (2806471770).

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

1969805190 is a wasteful number, since it uses less digits than its factorization.

1969805190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677016.

The product of its (nonzero) digits is 174960, while the sum is 48.

The square root of 1969805190 is about 44382.4874246588. The cubic root of 1969805190 is about 1253.5483583248.

The spelling of 1969805190 in words is "one billion, nine hundred sixty-nine million, eight hundred five thousand, one hundred ninety".