1009442855 has 8 divisors (see below), whose sum is σ = 1228392864. Its totient is φ = 796180000.

The previous prime is 1009442851. The next prime is 1009442857. The reversal of 1009442855 is 5582449001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1009442855 - 2² = 1009442851 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009442851) 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, 1421396 + ... + 1422105.

It is an arithmetic number, because the mean of its divisors is an integer number (153549108).

Almost surely, 2^1009442855 is an apocalyptic number.

1009442855 is a deficient number, since it is larger than the sum of its proper divisors (218950009).

1009442855 is an equidigital number, since it uses as much as digits as its factorization.

1009442855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2843577.

The product of its (nonzero) digits is 57600, while the sum is 38.

The square root of 1009442855 is about 31771.7304376076. The cubic root of 1009442855 is about 1003.1377624823.

The spelling of 1009442855 in words is "one billion, nine million, four hundred forty-two thousand, eight hundred fifty-five".