1305388 has 24 divisors (see below), whose sum is σ = 2725632. Its totient is φ = 534864.

The previous prime is 1305383. The next prime is 1305391. The reversal of 1305388 is 8835031.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (1305383) 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, 370 + ... + 1657.

It is an arithmetic number, because the mean of its divisors is an integer number (113568).

2^1305388 is an apocalyptic number.

It is an amenable number.

1305388 is an abundant number, since it is smaller than the sum of its proper divisors (1420244).

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

1305388 is a wasteful number, since it uses less digits than its factorization.

1305388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2061 (or 2059 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 1305388 is about 1142.5357762451. The cubic root of 1305388 is about 109.2898606004.

The spelling of 1305388 in words is "one million, three hundred five thousand, three hundred eighty-eight".