85597990 has 8 divisors (see below), whose sum is σ = 154076400. Its totient is φ = 34239192.

The previous prime is 85597943. The next prime is 85597997. The reversal of 85597990 is 9979558.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85597997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4279890 + ... + 4279909.

It is an arithmetic number, because the mean of its divisors is an integer number (19259550).

Almost surely, 2^85597990 is an apocalyptic number.

85597990 is a deficient number, since it is larger than the sum of its proper divisors (68478410).

85597990 is a wasteful number, since it uses less digits than its factorization.

85597990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8559806.

The product of its (nonzero) digits is 1020600, while the sum is 52.

The square root of 85597990 is about 9251.9181794912. The cubic root of 85597990 is about 440.7116410950.

The spelling of 85597990 in words is "eighty-five million, five hundred ninety-seven thousand, nine hundred ninety".