68623650 has 72 divisors (see below), whose sum is σ = 186983940. Its totient is φ = 18040320.

The previous prime is 68623637. The next prime is 68623661. The reversal of 68623650 is 5632686.

It can be written as a sum of positive squares in 6 ways, for example, as 41718681 + 26904969 = 6459^2 + 5187^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 31806 + ... + 33894.

Almost surely, 2^68623650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68623650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93491970).

68623650 is an abundant number, since it is smaller than the sum of its proper divisors (118360290).

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

68623650 is a wasteful number, since it uses less digits than its factorization.

68623650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2172 counting only the distinct ones).

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

The square root of 68623650 is about 8283.9392803183. The cubic root of 68623650 is about 409.4095208152.

It can be divided in two parts, 686 and 23650, that added together give a square (24336 = 156²).

The spelling of 68623650 in words is "sixty-eight million, six hundred twenty-three thousand, six hundred fifty".