68158040 has 32 divisors (see below), whose sum is σ = 155304000. Its totient is φ = 26916864.

The previous prime is 68158019. The next prime is 68158061. The reversal of 68158040 is 4085186.

It is an interprime number because it is at equal distance from previous prime (68158019) and next prime (68158061).

It is a junction number, because it is equal to n+sod(n) for n = 68157988 and 68158006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7625 + ... + 13944.

It is an arithmetic number, because the mean of its divisors is an integer number (4853250).

Almost surely, 2^68158040 is an apocalyptic number.

It is an amenable number.

68158040 is an abundant number, since it is smaller than the sum of its proper divisors (87145960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68158040 is a wasteful number, since it uses less digits than its factorization.

68158040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21659 (or 21655 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 32.

The square root of 68158040 is about 8255.7882724789. The cubic root of 68158040 is about 408.4814737609.

The spelling of 68158040 in words is "sixty-eight million, one hundred fifty-eight thousand, forty".