1395890 has 8 divisors (see below), whose sum is σ = 2512620. Its totient is φ = 558352.

The previous prime is 1395883. The next prime is 1395907. The reversal of 1395890 is 985931.

It can be written as a sum of positive squares in 2 ways, for example, as 1371241 + 24649 = 1171^2 + 157^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1395890.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69785 + ... + 69804.

2^1395890 is an apocalyptic number.

1395890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1395890 is a deficient number, since it is larger than the sum of its proper divisors (1116730).

1395890 is a wasteful number, since it uses less digits than its factorization.

1395890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139596.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1395890 is about 1181.4778880707. The cubic root of 1395890 is about 111.7593152036.

The spelling of 1395890 in words is "one million, three hundred ninety-five thousand, eight hundred ninety".