68235990 has 32 divisors (see below), whose sum is σ = 163994976. Its totient is φ = 18170880.

The previous prime is 68235983. The next prime is 68235997. The reversal of 68235990 is 9953286.

It is an interprime number because it is at equal distance from previous prime (68235983) and next prime (68235997).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68235997) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 31750 + ... + 33830.

It is an arithmetic number, because the mean of its divisors is an integer number (5124843).

Almost surely, 2^68235990 is an apocalyptic number.

68235990 is an abundant number, since it is smaller than the sum of its proper divisors (95758986).

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

68235990 is a wasteful number, since it uses less digits than its factorization.

68235990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184.

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 68235990 is about 8260.5078536371. The cubic root of 68235990 is about 408.6371364924.

The spelling of 68235990 in words is "sixty-eight million, two hundred thirty-five thousand, nine hundred ninety".