1922390 has 8 divisors (see below), whose sum is σ = 3460320. Its totient is φ = 768952.

The previous prime is 1922387. The next prime is 1922407. The reversal of 1922390 is 932291.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96110 + ... + 96129.

It is an arithmetic number, because the mean of its divisors is an integer number (432540).

2^1922390 is an apocalyptic number.

1922390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1922390 is a deficient number, since it is larger than the sum of its proper divisors (1537930).

1922390 is a wasteful number, since it uses less digits than its factorization.

1922390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192246.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1922390 is about 1386.5027948043. The cubic root of 1922390 is about 124.3408502828.

Subtracting from 1922390 its reverse (932291), we obtain a palindrome (990099).

The spelling of 1922390 in words is "one million, nine hundred twenty-two thousand, three hundred ninety".