68831520 has 96 divisors (see below), whose sum is σ = 218236032. Its totient is φ = 18235392.

The previous prime is 68831489. The next prime is 68831527. The reversal of 68831520 is 2513886.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (68831527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92269 + ... + 93011.

It is an arithmetic number, because the mean of its divisors is an integer number (2273292).

Almost surely, 2^68831520 is an apocalyptic number.

68831520 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 68831520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109118016).

68831520 is an abundant number, since it is smaller than the sum of its proper divisors (149404512).

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

68831520 is a wasteful number, since it uses less digits than its factorization.

68831520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 954 (or 946 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 33.

The square root of 68831520 is about 8296.4763604798. The cubic root of 68831520 is about 409.8224890901.

The spelling of 68831520 in words is "sixty-eight million, eight hundred thirty-one thousand, five hundred twenty".