1900408866 has 32 divisors (see below), whose sum is σ = 3820048128. Its totient is φ = 630274320.

The previous prime is 1900408819. The next prime is 1900408871. The reversal of 1900408866 is 6688040091.

It is a super-2 number, since 2×1900408866² = 7223107715942811912, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240521 + ... + 1242051.

It is an arithmetic number, because the mean of its divisors is an integer number (119376504).

Almost surely, 2^1900408866 is an apocalyptic number.

1900408866 is an abundant number, since it is smaller than the sum of its proper divisors (1919639262).

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

1900408866 is a wasteful number, since it uses less digits than its factorization.

1900408866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 1900408866 is about 43593.6791977920. The cubic root of 1900408866 is about 1238.6511664205.

The spelling of 1900408866 in words is "one billion, nine hundred million, four hundred eight thousand, eight hundred sixty-six".