85699440 has 60 divisors (see below), whose sum is σ = 287809704. Its totient is φ = 22852992.

The previous prime is 85699433. The next prime is 85699441. The reversal of 85699440 is 4499658.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85699441) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58794 + ... + 60233.

Almost surely, 2^85699440 is an apocalyptic number.

85699440 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

85699440 is an abundant number, since it is smaller than the sum of its proper divisors (202110264).

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

85699440 is a wasteful number, since it uses less digits than its factorization.

85699440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119046 (or 119037 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 45.

The square root of 85699440 is about 9257.3992027999. The cubic root of 85699440 is about 440.8856815689.

The spelling of 85699440 in words is "eighty-five million, six hundred ninety-nine thousand, four hundred forty".