1992381 has 8 divisors (see below), whose sum is σ = 2663424. Its totient is φ = 1324800.

The previous prime is 1992373. The next prime is 1992407. The reversal of 1992381 is 1832991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1992381 - 2³ = 1992373 is a prime.

It is a super-2 number, since 2×1992381² = 7939164098322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1992181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1156 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (332928).

2^1992381 is an apocalyptic number.

It is an amenable number.

1992381 is a deficient number, since it is larger than the sum of its proper divisors (671043).

1992381 is a wasteful number, since it uses less digits than its factorization.

1992381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1731.

The product of its digits is 3888, while the sum is 33.

The square root of 1992381 is about 1411.5172687573. The cubic root of 1992381 is about 125.8319124244.

The spelling of 1992381 in words is "one million, nine hundred ninety-two thousand, three hundred eighty-one".