85399040 has 40 divisors (see below), whose sum is σ = 204763680. Its totient is φ = 34158592.

The previous prime is 85399037. The next prime is 85399043. The reversal of 85399040 is 4099358.

It is an interprime number because it is at equal distance from previous prime (85399037) and next prime (85399043).

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 85398985 and 85399003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85399043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14120 + ... + 19239.

It is an arithmetic number, because the mean of its divisors is an integer number (5119092).

Almost surely, 2^85399040 is an apocalyptic number.

85399040 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85399040 is an abundant number, since it is smaller than the sum of its proper divisors (119364640).

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

85399040 is an equidigital number, since it uses as much as digits as its factorization.

85399040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33382 (or 33366 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 85399040 is about 9241.1601003337. The cubic root of 85399040 is about 440.3699368166.

The spelling of 85399040 in words is "eighty-five million, three hundred ninety-nine thousand, forty".