1899945454 has 32 divisors (see below), whose sum is σ = 3185930880. Its totient is φ = 842301600.

The previous prime is 1899945407. The next prime is 1899945503. The reversal of 1899945454 is 4545499981.

It is a super-2 number, since 2×1899945454² = 7219585456350532232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1048209 + ... + 1050019.

It is an arithmetic number, because the mean of its divisors is an integer number (99560340).

Almost surely, 2^1899945454 is an apocalyptic number.

1899945454 is a deficient number, since it is larger than the sum of its proper divisors (1285985426).

1899945454 is a wasteful number, since it uses less digits than its factorization.

1899945454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2976.

The product of its digits is 9331200, while the sum is 58.

The square root of 1899945454 is about 43588.3637453851. The cubic root of 1899945454 is about 1238.5504771271.

The spelling of 1899945454 in words is "one billion, eight hundred ninety-nine million, nine hundred forty-five thousand, four hundred fifty-four".