68830645 has 16 divisors (see below), whose sum is σ = 89479152. Its totient is φ = 50526720.

The previous prime is 68830621. The next prime is 68830649. The reversal of 68830645 is 54603886.

It can be written as a sum of positive squares in 8 ways, for example, as 4092529 + 64738116 = 2023^2 + 8046^2 .

It is not a de Polignac number, because 68830645 - 2⁵ = 68830613 is a prime.

It is a super-2 number, since 2×68830645² = 9475315382232050, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68830598 and 68830607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68830649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8185 + ... + 14305.

It is an arithmetic number, because the mean of its divisors is an integer number (5592447).

Almost surely, 2^68830645 is an apocalyptic number.

68830645 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

68830645 is a deficient number, since it is larger than the sum of its proper divisors (20648507).

68830645 is a wasteful number, since it uses less digits than its factorization.

68830645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312.

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 68830645 is about 8296.4236270817. The cubic root of 68830645 is about 409.8207525010.

The spelling of 68830645 in words is "sixty-eight million, eight hundred thirty thousand, six hundred forty-five".