1081185590 has 16 divisors (see below), whose sum is σ = 1946541888. Its totient is φ = 432383616.

The previous prime is 1081185583. The next prime is 1081185607. The reversal of 1081185590 is 955811801.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60419 + ... + 76241.

It is an arithmetic number, because the mean of its divisors is an integer number (121658868).

Almost surely, 2^1081185590 is an apocalyptic number.

1081185590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1081185590 is a deficient number, since it is larger than the sum of its proper divisors (865356298).

1081185590 is a wasteful number, since it uses less digits than its factorization.

1081185590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22663.

The product of its (nonzero) digits is 14400, while the sum is 38.

The square root of 1081185590 is about 32881.3866800048. The cubic root of 1081185590 is about 1026.3608622631.

The spelling of 1081185590 in words is "one billion, eighty-one million, one hundred eighty-five thousand, five hundred ninety".