1926081381 has 16 divisors (see below), whose sum is σ = 2946682368. Its totient is φ = 1096230000.

The previous prime is 1926081359. The next prime is 1926081401. The reversal of 1926081381 is 1831806291.

It is not a de Polignac number, because 1926081381 - 2²¹ = 1923984229 is a prime.

It is a super-2 number, since 2×1926081381² = 7419578972469734322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1926081301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 177435 + ... + 187976.

It is an arithmetic number, because the mean of its divisors is an integer number (184167648).

Almost surely, 2^1926081381 is an apocalyptic number.

It is an amenable number.

1926081381 is a deficient number, since it is larger than the sum of its proper divisors (1020600987).

1926081381 is a wasteful number, since it uses less digits than its factorization.

1926081381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365672.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1926081381 is about 43887.1436869614. The cubic root of 1926081381 is about 1244.2038599627.

The spelling of 1926081381 in words is "one billion, nine hundred twenty-six million, eighty-one thousand, three hundred eighty-one".