1899844725 has 12 divisors (see below), whose sum is σ = 3141076736. Its totient is φ = 1013250480.

The previous prime is 1899844711. The next prime is 1899844733. The reversal of 1899844725 is 5274489981.

It is not a de Polignac number, because 1899844725 - 2¹⁴ = 1899828341 is a prime.

It is a super-2 number, since 2×1899844725² = 7218819958220651250, which contains 22 as substring.

It is a Duffinian number.

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 11 ways as a sum of consecutive naturals, for example, 12665557 + ... + 12665706.

Almost surely, 2^1899844725 is an apocalyptic number.

1899844725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1899844725 is a deficient number, since it is larger than the sum of its proper divisors (1241232011).

1899844725 is a wasteful number, since it uses less digits than its factorization.

1899844725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331276 (or 25331271 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The square root of 1899844725 is about 43587.2082726114. The cubic root of 1899844725 is about 1238.5285887521.

The spelling of 1899844725 in words is "one billion, eight hundred ninety-nine million, eight hundred forty-four thousand, seven hundred twenty-five".