1992840 has 32 divisors (see below), whose sum is σ = 5978880. Its totient is φ = 531392.

The previous prime is 1992839. The next prime is 1992841. The reversal of 1992840 is 482991.

It is an interprime number because it is at equal distance from previous prime (1992839) and next prime (1992841).

It is a super-2 number, since 2×1992840² = 7942822531200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1992841) 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, 8184 + ... + 8423.

It is an arithmetic number, because the mean of its divisors is an integer number (186840).

2^1992840 is an apocalyptic number.

1992840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1992840 is an abundant number, since it is smaller than the sum of its proper divisors (3986040).

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

1992840 is a wasteful number, since it uses less digits than its factorization.

1992840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16621 (or 16617 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 1992840 is about 1411.6798503910. The cubic root of 1992840 is about 125.8415746348.

The spelling of 1992840 in words is "one million, nine hundred ninety-two thousand, eight hundred forty".