1339820 has 24 divisors (see below), whose sum is σ = 2905728. Its totient is φ = 518400.

The previous prime is 1339817. The next prime is 1339843. The reversal of 1339820 is 289331.

It is a self number, because there is not a number n which added to its sum of digits gives 1339820.

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, 461 + ... + 1700.

It is an arithmetic number, because the mean of its divisors is an integer number (121072).

2^1339820 is an apocalyptic number.

1339820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1339820 is an abundant number, since it is smaller than the sum of its proper divisors (1565908).

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

1339820 is a wasteful number, since it uses less digits than its factorization.

1339820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201 (or 2199 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1339820 is about 1157.5059395096. The cubic root of 1339820 is about 110.2424404742.

The spelling of 1339820 in words is "one million, three hundred thirty-nine thousand, eight hundred twenty".