52780068 has 36 divisors (see below), whose sum is σ = 145546128. Its totient is φ = 15993840.

The previous prime is 52780061. The next prime is 52780069. The reversal of 52780068 is 86008725.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (52780061) 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 11 ways as a sum of consecutive naturals, for example, 66246 + ... + 67037.

It is an arithmetic number, because the mean of its divisors is an integer number (4042948).

Almost surely, 2^52780068 is an apocalyptic number.

It is an amenable number.

52780068 is an abundant number, since it is smaller than the sum of its proper divisors (92766060).

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

52780068 is a wasteful number, since it uses less digits than its factorization.

52780068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133304 (or 133299 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 52780068 is about 7264.9891947614. The cubic root of 52780068 is about 375.1082780660.

The spelling of 52780068 in words is "fifty-two million, seven hundred eighty thousand, sixty-eight".