68309085 has 64 divisors (see below), whose sum is σ = 125798400. Its totient is φ = 31373568.

The previous prime is 68309071. The next prime is 68309173. The reversal of 68309085 is 58090386.

It is not a de Polignac number, because 68309085 - 2⁷ = 68308957 is a prime.

It is a super-2 number, since 2×68309085² = 9332262187074450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 381526 + ... + 381704.

It is an arithmetic number, because the mean of its divisors is an integer number (1965600).

Almost surely, 2^68309085 is an apocalyptic number.

68309085 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68309085 is a deficient number, since it is larger than the sum of its proper divisors (57489315).

68309085 is a wasteful number, since it uses less digits than its factorization.

68309085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 68309085 is about 8264.9310341950. The cubic root of 68309085 is about 408.7829963356.

The spelling of 68309085 in words is "sixty-eight million, three hundred nine thousand, eighty-five".