1395440 has 20 divisors (see below), whose sum is σ = 3244584. Its totient is φ = 558144.

The previous prime is 1395439. The next prime is 1395463. The reversal of 1395440 is 445931.

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 8642 + ... + 8801.

2^1395440 is an apocalyptic number.

1395440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1395440 is an abundant number, since it is smaller than the sum of its proper divisors (1849144).

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

1395440 is a wasteful number, since it uses less digits than its factorization.

1395440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17456 (or 17450 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1395440 is about 1181.2874332693. The cubic root of 1395440 is about 111.7473044441.

The spelling of 1395440 in words is "one million, three hundred ninety-five thousand, four hundred forty".