1926419881 has 3 divisors (see below), whose sum is σ = 1926463773. Its totient is φ = 1926375990.

The previous prime is 1926419843. The next prime is 1926419951. The reversal of 1926419881 is 1889146291.

The square root of 1926419881 is 43891.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1926419881 - 2¹¹ = 1926417833 is a prime.

It is a super-2 number, since 2×1926419881² = 7422187115824108322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1926419981) 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 2 ways as a sum of consecutive naturals, for example, 21946 + ... + 65836.

It is an arithmetic number, because the mean of its divisors is an integer number (642154591).

Almost surely, 2^1926419881 is an apocalyptic number.

1926419881 is the 43891-st square number.

1926419881 is the 21946-th centered octagonal number.

It is an amenable number.

1926419881 is a deficient number, since it is larger than the sum of its proper divisors (43892).

1926419881 is an frugal number, since it uses more digits than its factorization.

1926419881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87782 (or 43891 counting only the distinct ones).

The product of its digits is 248832, while the sum is 49.

The cubic root of 1926419881 is about 1244.2767434072.

Multiplying 1926419881 by its sum of digits (49), we get a square (94394574169 = 307237²).

The spelling of 1926419881 in words is "one billion, nine hundred twenty-six million, four hundred nineteen thousand, eight hundred eighty-one".