85440001 has 8 divisors (see below), whose sum is σ = 86688000. Its totient is φ = 84196320.

The previous prime is 85439989. The next prime is 85440007. The reversal of 85440001 is 10004458.

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

It is a cyclic number.

It is not a de Polignac number, because 85440001 - 2⁵ = 85439969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85440007) 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, 80925 + ... + 81973.

It is an arithmetic number, because the mean of its divisors is an integer number (10836000).

Almost surely, 2^85440001 is an apocalyptic number.

It is an amenable number.

85440001 is a deficient number, since it is larger than the sum of its proper divisors (1247999).

85440001 is a wasteful number, since it uses less digits than its factorization.

85440001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 85440001 is about 9243.3760607259. The cubic root of 85440001 is about 440.4403322599.

Adding to 85440001 its reverse (10004458), we get a palindrome (95444459).

The spelling of 85440001 in words is "eighty-five million, four hundred forty thousand, one".