1913238 has 12 divisors (see below), whose sum is σ = 4145388. Its totient is φ = 637740.

The previous prime is 1913221. The next prime is 1913251. The reversal of 1913238 is 8323191.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53128 + ... + 53163.

It is an arithmetic number, because the mean of its divisors is an integer number (345449).

2^1913238 is an apocalyptic number.

1913238 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1913238 is an abundant number, since it is smaller than the sum of its proper divisors (2232150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1913238 is a wasteful number, since it uses less digits than its factorization.

1913238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106299 (or 106296 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 1913238 is about 1383.1984673213. The cubic root of 1913238 is about 124.1432181497.

The spelling of 1913238 in words is "one million, nine hundred thirteen thousand, two hundred thirty-eight".