68279520 has 96 divisors (see below), whose sum is σ = 218816640. Its totient is φ = 17891840.

The previous prime is 68279513. The next prime is 68279551. The reversal of 68279520 is 2597286.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 27115 + ... + 29525.

It is an arithmetic number, because the mean of its divisors is an integer number (2279340).

Almost surely, 2^68279520 is an apocalyptic number.

68279520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68279520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109408320).

68279520 is an abundant number, since it is smaller than the sum of its proper divisors (150537120).

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

68279520 is a wasteful number, since it uses less digits than its factorization.

68279520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2488 (or 2480 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 68279520 is about 8263.1422594555. The cubic root of 68279520 is about 408.7240124132.

The spelling of 68279520 in words is "sixty-eight million, two hundred seventy-nine thousand, five hundred twenty".