1992390 has 16 divisors (see below), whose sum is σ = 4781808. Its totient is φ = 531296.

The previous prime is 1992373. The next prime is 1992407. The reversal of 1992390 is 932991.

It is an interprime number because it is at equal distance from previous prime (1992373) and next prime (1992407).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33177 + ... + 33236.

It is an arithmetic number, because the mean of its divisors is an integer number (298863).

2^1992390 is an apocalyptic number.

1992390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1992390 is an abundant number, since it is smaller than the sum of its proper divisors (2789418).

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

1992390 is a wasteful number, since it uses less digits than its factorization.

1992390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66423.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 1992390 is about 1411.5204568124. The cubic root of 1992390 is about 125.8321018938.

The spelling of 1992390 in words is "one million, nine hundred ninety-two thousand, three hundred ninety".