85240385 has 4 divisors (see below), whose sum is σ = 102288468. Its totient is φ = 68192304.

The previous prime is 85240381. The next prime is 85240409. The reversal of 85240385 is 58304258.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58304258 = 2 ⋅29152129.

It can be written as a sum of positive squares in 2 ways, for example, as 35509681 + 49730704 = 5959^2 + 7052^2 .

It is a cyclic number.

It is not a de Polignac number, because 85240385 - 2² = 85240381 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85240381) 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, 8524034 + ... + 8524043.

It is an arithmetic number, because the mean of its divisors is an integer number (25572117).

Almost surely, 2^85240385 is an apocalyptic number.

It is an amenable number.

85240385 is a deficient number, since it is larger than the sum of its proper divisors (17048083).

85240385 is a wasteful number, since it uses less digits than its factorization.

85240385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17048082.

The product of its (nonzero) digits is 38400, while the sum is 35.

The square root of 85240385 is about 9232.5719601853. The cubic root of 85240385 is about 440.0970601994.

The spelling of 85240385 in words is "eighty-five million, two hundred forty thousand, three hundred eighty-five".