1090690 has 16 divisors (see below), whose sum is σ = 2031480. Its totient is φ = 421120.

The previous prime is 1090681. The next prime is 1090697. The reversal of 1090690 is 960901.

It can be written as a sum of positive squares in 4 ways, for example, as 859329 + 231361 = 927^2 + 481^2 .

It is a super-2 number, since 2×1090690² = 2379209352200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1090697) 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, 1591 + ... + 2170.

2^1090690 is an apocalyptic number.

1090690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1090690 is a deficient number, since it is larger than the sum of its proper divisors (940790).

1090690 is a wasteful number, since it uses less digits than its factorization.

1090690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3797.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1090690 is about 1044.3610486800. The cubic root of 1090690 is about 102.9359579267.

The spelling of 1090690 in words is "one million, ninety thousand, six hundred ninety".