1206388 has 24 divisors (see below), whose sum is σ = 2269512. Its totient is φ = 559104.

The previous prime is 1206383. The next prime is 1206391. The reversal of 1206388 is 8836021.

It can be written as a sum of positive squares in 4 ways, for example, as 13924 + 1192464 = 118^2 + 1092^2 .

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206383) 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, 7606 + ... + 7762.

It is an arithmetic number, because the mean of its divisors is an integer number (94563).

2^1206388 is an apocalyptic number.

It is an amenable number.

1206388 is a deficient number, since it is larger than the sum of its proper divisors (1063124).

1206388 is a wasteful number, since it uses less digits than its factorization.

1206388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 1206388 is about 1098.3569547283. The cubic root of 1206388 is about 106.4540861694.

The spelling of 1206388 in words is "one million, two hundred six thousand, three hundred eighty-eight".