1899464481 has 12 divisors (see below), whose sum is σ = 2748154708. Its totient is φ = 1264240224.

The previous prime is 1899464477. The next prime is 1899464503. The reversal of 1899464481 is 1844649981.

It is a happy number.

1899464481 is a `hidden beast` number, since 18 + 9 + 94 + 64 + 481 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 234090000 + 1665374481 = 15300^2 + 40809^2 .

It is not a de Polignac number, because 1899464481 - 2² = 1899464477 is a prime.

It is a super-2 number, since 2×1899464481² = 7215930629161198722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1899464401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 166630 + ... + 177663.

Almost surely, 2^1899464481 is an apocalyptic number.

It is an amenable number.

1899464481 is a deficient number, since it is larger than the sum of its proper divisors (848690227).

1899464481 is a wasteful number, since it uses less digits than its factorization.

1899464481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344912 (or 344909 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1899464481 is about 43582.8461782844. The cubic root of 1899464481 is about 1238.4459548960.

The spelling of 1899464481 in words is "one billion, eight hundred ninety-nine million, four hundred sixty-four thousand, four hundred eighty-one".