68563620 has 36 divisors (see below), whose sum is σ = 207976860. Its totient is φ = 18283584.

The previous prime is 68563619. The next prime is 68563643. The reversal of 68563620 is 2636586.

It can be written as a sum of positive squares in 2 ways, for example, as 42614784 + 25948836 = 6528^2 + 5094^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 190275 + ... + 190634.

It is an arithmetic number, because the mean of its divisors is an integer number (5777135).

Almost surely, 2^68563620 is an apocalyptic number.

68563620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68563620 is an abundant number, since it is smaller than the sum of its proper divisors (139413240).

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

68563620 is a wasteful number, since it uses less digits than its factorization.

68563620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 380924 (or 380919 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 68563620 is about 8280.3152113914. The cubic root of 68563620 is about 409.2901060877.

The spelling of 68563620 in words is "sixty-eight million, five hundred sixty-three thousand, six hundred twenty".