85385040 has 80 divisors (see below), whose sum is σ = 285065088. Its totient is φ = 21017088.

The previous prime is 85385029. The next prime is 85385051. The reversal of 85385040 is 4058358.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85385029) and next prime (85385051).

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 = 85384992 and 85385010.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10564 + ... + 16803.

Almost surely, 2^85385040 is an apocalyptic number.

85385040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85385040 is an abundant number, since it is smaller than the sum of its proper divisors (199680048).

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

85385040 is a wasteful number, since it uses less digits than its factorization.

85385040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27396 (or 27390 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 85385040 is about 9240.4025886322. The cubic root of 85385040 is about 440.3458713000.

The spelling of 85385040 in words is "eighty-five million, three hundred eighty-five thousand, forty".