1081066890 has 32 divisors (see below), whose sum is σ = 2747183040. Its totient is φ = 271326464.

The previous prime is 1081066879. The next prime is 1081066897. The reversal of 1081066890 is 986601801.

It is not an unprimeable number, because it can be changed into a prime (1081066897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1059360 + ... + 1060379.

It is an arithmetic number, because the mean of its divisors is an integer number (85849470).

Almost surely, 2^1081066890 is an apocalyptic number.

1081066890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1081066890 is an abundant number, since it is smaller than the sum of its proper divisors (1666116150).

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

1081066890 is a wasteful number, since it uses less digits than its factorization.

1081066890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119766.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 1081066890 is about 32879.5816579226. The cubic root of 1081066890 is about 1026.3233005672.

The spelling of 1081066890 in words is "one billion, eighty-one million, sixty-six thousand, eight hundred ninety".