1395820 has 24 divisors (see below), whose sum is σ = 2964528. Its totient is φ = 552000.

The previous prime is 1395817. The next prime is 1395829. The reversal of 1395820 is 285931.

It is not an unprimeable number, because it can be changed into a prime (1395829) 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, 1675 + ... + 2365.

It is an arithmetic number, because the mean of its divisors is an integer number (123522).

2^1395820 is an apocalyptic number.

1395820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1395820 is an abundant number, since it is smaller than the sum of its proper divisors (1568708).

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

1395820 is a wasteful number, since it uses less digits than its factorization.

1395820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1395820 is about 1181.4482637847. The cubic root of 1395820 is about 111.7574470328.

The spelling of 1395820 in words is "one million, three hundred ninety-five thousand, eight hundred twenty".