1090990 has 16 divisors (see below), whose sum is σ = 1990080. Its totient is φ = 430560.

The previous prime is 1090979. The next prime is 1090997. The reversal of 1090990 is 990901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090997) 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, 100 + ... + 1480.

It is an arithmetic number, because the mean of its divisors is an integer number (124380).

2^1090990 is an apocalyptic number.

1090990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1090990 is a deficient number, since it is larger than the sum of its proper divisors (899090).

1090990 is a wasteful number, since it uses less digits than its factorization.

1090990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 729, while the sum is 28.

The square root of 1090990 is about 1044.5046672945. The cubic root of 1090990 is about 102.9453947531.

It can be divided in two parts, 1090 and 990, that added together give a triangular number (2080 = T₆₄).

The spelling of 1090990 in words is "one million, ninety thousand, nine hundred ninety".