68477520 has 80 divisors (see below), whose sum is σ = 223467840. Its totient is φ = 17298432.

The previous prime is 68477483. The next prime is 68477527. The reversal of 68477520 is 2577486.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68477527) 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, 2949 + ... + 12068.

It is an arithmetic number, because the mean of its divisors is an integer number (2793348).

Almost surely, 2^68477520 is an apocalyptic number.

68477520 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68477520 is an abundant number, since it is smaller than the sum of its proper divisors (154990320).

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

68477520 is a wasteful number, since it uses less digits than its factorization.

68477520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15052 (or 15046 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 39.

The square root of 68477520 is about 8275.1145007184. The cubic root of 68477520 is about 409.1187098503.

The spelling of 68477520 in words is "sixty-eight million, four hundred seventy-seven thousand, five hundred twenty".