1090388 has 18 divisors (see below), whose sum is σ = 2067534. Its totient is φ = 502944.

The previous prime is 1090387. The next prime is 1090403. The reversal of 1090388 is 8830901.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 4624 + 1085764 = 68^2 + 1042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1090388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131 + ... + 1482.

It is an arithmetic number, because the mean of its divisors is an integer number (114863).

2^1090388 is an apocalyptic number.

It is an amenable number.

1090388 is a deficient number, since it is larger than the sum of its proper divisors (977146).

1090388 is a wasteful number, since it uses less digits than its factorization.

1090388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1643 (or 1628 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1090388 is about 1044.2164526572. The cubic root of 1090388 is about 102.9264564402.

The spelling of 1090388 in words is "one million, ninety thousand, three hundred eighty-eight".