53291780 has 12 divisors (see below), whose sum is σ = 111912780. Its totient is φ = 21316704.

The previous prime is 53291779. The next prime is 53291783. The reversal of 53291780 is 8719235.

It can be written as a sum of positive squares in 2 ways, for example, as 17960644 + 35331136 = 4238^2 + 5944^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 53291780.

It is not an unprimeable number, because it can be changed into a prime (53291783) 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 3 ways as a sum of consecutive naturals, for example, 1332275 + ... + 1332314.

It is an arithmetic number, because the mean of its divisors is an integer number (9326065).

Almost surely, 2^53291780 is an apocalyptic number.

It is an amenable number.

53291780 is an abundant number, since it is smaller than the sum of its proper divisors (58621000).

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

53291780 is a wasteful number, since it uses less digits than its factorization.

53291780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2664598 (or 2664596 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 53291780 is about 7300.1219167902. The cubic root of 53291780 is about 376.3166281934.

The spelling of 53291780 in words is "fifty-three million, two hundred ninety-one thousand, seven hundred eighty".