1949752881 has 12 divisors (see below), whose sum is σ = 2864044560. Its totient is φ = 1277803800.

The previous prime is 1949752837. The next prime is 1949752897. The reversal of 1949752881 is 1882579491.

It is a happy number.

It is not a de Polignac number, because 1949752881 - 2¹⁰ = 1949751857 is a prime.

It is a super-2 number, since 2×1949752881² = 7603072593935600322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1949752801) by changing a digit.

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, 1835395 + ... + 1836456.

It is an arithmetic number, because the mean of its divisors is an integer number (238670380).

Almost surely, 2^1949752881 is an apocalyptic number.

It is an amenable number.

1949752881 is a deficient number, since it is larger than the sum of its proper divisors (914291679).

1949752881 is a wasteful number, since it uses less digits than its factorization.

1949752881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3671916 (or 3671913 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 54.

The square root of 1949752881 is about 44156.0061713013. The cubic root of 1949752881 is about 1249.2802002035.

The spelling of 1949752881 in words is "one billion, nine hundred forty-nine million, seven hundred fifty-two thousand, eight hundred eighty-one".