1891392 has 28 divisors (see below), whose sum is σ = 5004816. Its totient is φ = 630400.

The previous prime is 1891391. The next prime is 1891429. The reversal of 1891392 is 2931981.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1891391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4734 + ... + 5117.

2^1891392 is an apocalyptic number.

1891392 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1891392 is an abundant number, since it is smaller than the sum of its proper divisors (3113424).

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

1891392 is an equidigital number, since it uses as much as digits as its factorization.

1891392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9866 (or 9856 counting only the distinct ones).

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

The square root of 1891392 is about 1375.2788808093. The cubic root of 1891392 is about 123.6689051387.

The spelling of 1891392 in words is "one million, eight hundred ninety-one thousand, three hundred ninety-two".