1822920 has 64 divisors (see below), whose sum is σ = 5970240. Its totient is φ = 441600.

The previous prime is 1822907. The next prime is 1822939. The reversal of 1822920 is 292281.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 630 + ... + 2010.

It is an arithmetic number, because the mean of its divisors is an integer number (93285).

2^1822920 is an apocalyptic number.

1822920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1822920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2985120).

1822920 is an abundant number, since it is smaller than the sum of its proper divisors (4147320).

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

1822920 is a wasteful number, since it uses less digits than its factorization.

1822920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406 (or 1402 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 1822920 is about 1350.1555465945. The cubic root of 1822920 is about 122.1581751981.

The spelling of 1822920 in words is "one million, eight hundred twenty-two thousand, nine hundred twenty".