53805780 has 72 divisors (see below), whose sum is σ = 186531072. Its totient is φ = 12298176.

The previous prime is 53805769. The next prime is 53805821. The reversal of 53805780 is 8750835.

It is a happy number.

53805780 is a `hidden beast` number, since 5 + 3 + 80 + 578 + 0 = 666.

It is a super-2 number, since 2×53805780² = 5790123922816800, which contains 22 as substring.

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

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 23 ways as a sum of consecutive naturals, for example, 20092 + ... + 22611.

Almost surely, 2^53805780 is an apocalyptic number.

It is an amenable number.

53805780 is an abundant number, since it is smaller than the sum of its proper divisors (132725292).

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

53805780 is a wasteful number, since it uses less digits than its factorization.

53805780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42725 (or 42720 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 53805780 is about 7335.2423272854. The cubic root of 53805780 is about 377.5226189976.

The spelling of 53805780 in words is "fifty-three million, eight hundred five thousand, seven hundred eighty".