85901890 has 8 divisors (see below), whose sum is σ = 154623420. Its totient is φ = 34360752.

The previous prime is 85901887. The next prime is 85901891. The reversal of 85901890 is 9810958.

It can be written as a sum of positive squares in 2 ways, for example, as 84805681 + 1096209 = 9209^2 + 1047^2 .

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

It is not an unprimeable number, because it can be changed into a prime (85901891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4295085 + ... + 4295104.

Almost surely, 2^85901890 is an apocalyptic number.

85901890 is a deficient number, since it is larger than the sum of its proper divisors (68721530).

85901890 is a wasteful number, since it uses less digits than its factorization.

85901890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8590196.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 85901890 is about 9268.3272492937. The cubic root of 85901890 is about 441.2325804260.

The spelling of 85901890 in words is "eighty-five million, nine hundred one thousand, eight hundred ninety".