1022009985 has 24 divisors (see below), whose sum is σ = 1772409600. Its totient is φ = 544787232.

The previous prime is 1022009983. The next prime is 1022010007. The reversal of 1022009985 is 5899002201.

It is not a de Polignac number, because 1022009985 - 2¹ = 1022009983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1022009983) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103222 + ... + 112688.

It is an arithmetic number, because the mean of its divisors is an integer number (73850400).

Almost surely, 2^1022009985 is an apocalyptic number.

1022009985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1022009985 is a deficient number, since it is larger than the sum of its proper divisors (750399615).

1022009985 is a wasteful number, since it uses less digits than its factorization.

1022009985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11877 (or 11874 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 1022009985 is about 31968.8908941177. The cubic root of 1022009985 is about 1007.2834837371.

The spelling of 1022009985 in words is "one billion, twenty-two million, nine thousand, nine hundred eighty-five".