1899489950 has 24 divisors (see below), whose sum is σ = 3567362448. Its totient is φ = 752417280.

The previous prime is 1899489901. The next prime is 1899489953. The reversal of 1899489950 is 599849981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1899489953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 179267 + ... + 189566.

It is an arithmetic number, because the mean of its divisors is an integer number (148640102).

Almost surely, 2^1899489950 is an apocalyptic number.

1899489950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1899489950 is a deficient number, since it is larger than the sum of its proper divisors (1667872498).

1899489950 is a wasteful number, since it uses less digits than its factorization.

1899489950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368948 (or 368943 counting only the distinct ones).

The product of its (nonzero) digits is 8398080, while the sum is 62.

The square root of 1899489950 is about 43583.1383679514. The cubic root of 1899489950 is about 1238.4514901120.

The spelling of 1899489950 in words is "one billion, eight hundred ninety-nine million, four hundred eighty-nine thousand, nine hundred fifty".