68905620 has 96 divisors (see below), whose sum is σ = 245011200. Its totient is φ = 15748992.

The previous prime is 68905601. The next prime is 68905621. The reversal of 68905620 is 2650986.

68905620 is a `hidden beast` number, since 6 + 8 + 90 + 562 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68905621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5335 + ... + 12894.

It is an arithmetic number, because the mean of its divisors is an integer number (2552200).

Almost surely, 2^68905620 is an apocalyptic number.

68905620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68905620 is an abundant number, since it is smaller than the sum of its proper divisors (176105580).

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

68905620 is a wasteful number, since it uses less digits than its factorization.

68905620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18254 (or 18246 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 68905620 is about 8300.9409105233. The cubic root of 68905620 is about 409.9695000115.

The spelling of 68905620 in words is "sixty-eight million, nine hundred five thousand, six hundred twenty".