920149785 has 24 divisors (see below), whose sum is σ = 1628864640. Its totient is φ = 480304032.

The previous prime is 920149777. The next prime is 920149831. The reversal of 920149785 is 587941029.

It is not a de Polignac number, because 920149785 - 2³ = 920149777 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 920149785.

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 23 ways as a sum of consecutive naturals, for example, 215415 + ... + 219644.

It is an arithmetic number, because the mean of its divisors is an integer number (67869360).

Almost surely, 2^920149785 is an apocalyptic number.

It is an amenable number.

920149785 is a deficient number, since it is larger than the sum of its proper divisors (708714855).

920149785 is a wasteful number, since it uses less digits than its factorization.

920149785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 435117 (or 435114 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 920149785 is about 30333.9708083198. The cubic root of 920149785 is about 972.6416056797.

The spelling of 920149785 in words is "nine hundred twenty million, one hundred forty-nine thousand, seven hundred eighty-five".