1268388 has 36 divisors (see below), whose sum is σ = 3498768. Its totient is φ = 384240.

The previous prime is 1268369. The next prime is 1268413. The reversal of 1268388 is 8838621.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1206 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (97188).

2^1268388 is an apocalyptic number.

1268388 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1268388 is an abundant number, since it is smaller than the sum of its proper divisors (2230380).

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

1268388 is a wasteful number, since it uses less digits than its factorization.

1268388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3224 (or 3219 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1268388 is about 1126.2273305155. The cubic root of 1268388 is about 108.2473753379.

The spelling of 1268388 in words is "one million, two hundred sixty-eight thousand, three hundred eighty-eight".