85463440 has 80 divisors (see below), whose sum is σ = 205361856. Its totient is φ = 33062400.

The previous prime is 85463429. The next prime is 85463449. The reversal of 85463440 is 4436458.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 85463396 and 85463405.

It is not an unprimeable number, because it can be changed into a prime (85463449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 404935 + ... + 405145.

Almost surely, 2^85463440 is an apocalyptic number.

85463440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 85463440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102680928).

85463440 is an abundant number, since it is smaller than the sum of its proper divisors (119898416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

85463440 is a wasteful number, since it uses less digits than its factorization.

85463440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 362 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 34.

The square root of 85463440 is about 9244.6438546869. The cubic root of 85463440 is about 440.4806043297.

Adding to 85463440 its reverse (4436458), we get a palindrome (89899898).

The spelling of 85463440 in words is "eighty-five million, four hundred sixty-three thousand, four hundred forty".