68558390 has 16 divisors (see below), whose sum is σ = 123651360. Its totient is φ = 27368640.

The previous prime is 68558389. The next prime is 68558411. The reversal of 68558390 is 9385586.

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, 1370 + ... + 11789.

It is an arithmetic number, because the mean of its divisors is an integer number (7728210).

Almost surely, 2^68558390 is an apocalyptic number.

68558390 is a deficient number, since it is larger than the sum of its proper divisors (55092970).

68558390 is a wasteful number, since it uses less digits than its factorization.

68558390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13687.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 68558390 is about 8279.9993961352. Note that the first 3 decimals coincide. The cubic root of 68558390 is about 409.2796990055.

The spelling of 68558390 in words is "sixty-eight million, five hundred fifty-eight thousand, three hundred ninety".