920681590 has 16 divisors (see below), whose sum is σ = 1692487872. Its totient is φ = 360436864.

The previous prime is 920681561. The next prime is 920681623. The reversal of 920681590 is 95186029.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 978979 + ... + 979918.

It is an arithmetic number, because the mean of its divisors is an integer number (105780492).

Almost surely, 2^920681590 is an apocalyptic number.

920681590 is a deficient number, since it is larger than the sum of its proper divisors (771806282).

920681590 is a wasteful number, since it uses less digits than its factorization.

920681590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958951.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 920681590 is about 30342.7353743857. The cubic root of 920681590 is about 972.8289505589.

The spelling of 920681590 in words is "nine hundred twenty million, six hundred eighty-one thousand, five hundred ninety".