36143985 has 32 divisors (see below), whose sum is σ = 62853120. Its totient is φ = 17668800.

The previous prime is 36143981. The next prime is 36143993. The reversal of 36143985 is 58934163.

It is not a de Polignac number, because 36143985 - 2² = 36143981 is a prime.

It is not an unprimeable number, because it can be changed into a prime (36143981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6790 + ... + 10880.

It is an arithmetic number, because the mean of its divisors is an integer number (1964160).

Almost surely, 2^36143985 is an apocalyptic number.

It is an amenable number.

36143985 is a deficient number, since it is larger than the sum of its proper divisors (26709135).

36143985 is a wasteful number, since it uses less digits than its factorization.

36143985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4149.

The product of its digits is 77760, while the sum is 39.

The square root of 36143985 is about 6011.9867764326. The cubic root of 36143985 is about 330.6323504095.

It can be divided in two parts, 36143 and 985, that added together give a triangular number (37128 = T₂₇₂).

The spelling of 36143985 in words is "thirty-six million, one hundred forty-three thousand, nine hundred eighty-five".